Answer: GUNKSHOT
Explanation: Gunk Shot is 70% accurate, has 120 power and a 30% chance to poison the enemy, so it works just like a Poison-type version of Thunder.
Answer: AMPHAROS
Explanation: Ampharos's Japanese name is Denryuu. 'Ryuu' means 'dragon', so the clue is just a play on words - by translating half of the name, you get Den-Dragon, which can easily be reversed into Dragon's Den.
Answer: BURMY
Explanation: There is a guy in Pastoria City who will give you the Macho Brace if you show him all three forms of Burmy. However, there is no reason one would carry all of Burmy's forms at the same time, since Burmy transforms when it faints (and thus you can see all the forms for yourself without having caught more than one Burmy).
Answer: EKANS
Explanation: Ekans is, as everybody knows, 'snake' spelled backwards. It's not Arbok because it tweaks the word it's derived from (kobra, rather than cobra). Yes, I know this was easy.
Answer: IRONHEAD
Explanation: Iron Head has a 30% chance of making the target flinch and has a power of 80. Sky Attack also has a 30% chance of making the target flinch, but since it takes two turns, the average damage per turn is only 70 (and since it is only 90% accurate, it is in fact 63). There are stronger single-turn moves such as Dragon Rush that have a 20% chance of flinching, but none with that 30% chance.
Answer: TORTERRA
Explanation: I'm not sure how I thought anyone could figure this out the way it was intended, but this is not a reference to the quality of the Pokémon themselves but to the wrongness of their classifications. Blastoise's classification is 'Shellfish Pokémon', which is obviously not what Blastoise is. Torterra, however, is the 'Continent Pokémon'. Uh... right. o_O
Answer: ARON
Explanation: This can plainly be seen by looking at some images of Aron.
Answer: MOTHIM
Explanation: Mothim is an all-male species, so essentially any female ones are a myth. The actual sentence I originally heard from a list of supposed quotes that, from a quick Google search, can for example be found at the bottom of this page.
Answer: FARFETCHD
Explanation: Farfetch'd's name spelled backwards is d'hctefraf. While 'hctefraf' doesn't make a lot of sense, the d' is reminiscent of d'Artagnan, who was the hero of in Alexandre Dumas' The Three Musketeers.
Answer: ICEFANG
Explanation: Well, snow is white.
Answer: SQUIRTLE
Explanation: According to Squirtle's Gold version Pokédex entry, it is born with a soft shell, but the Red/Blue entry implies that it is born with no shell at all, as it says that its back "hardens into a shell". Which one is it?
Answer: CHARMELEON
Explanation: Ash's Charmander took awfully long to evolve - it only did so at the end of episode 41, March of the Exeggutor Squad, where the trigger for its evolution was a marching forest of Exeggutor that it burned up. Funnily enough, it evolved into Charizard only three episodes later.
Answer: SEVIPER
Explanation: Well, it starts with 'Sev' and has a P in it.
Answer: DRAPION
Explanation: Its name is probably a portmanteau of 'Dracula' or something like that and 'scorpion', but it makes me think 'drape accordion'. I mean, it does resemble an accordion, after all...
Answer: ETERNAFOREST
Explanation: "A bad pixel virtue riling" is an anagram of "Viridian", "Ilex" and "Petalburg" - what the early-game forests in the previous generations were named after. Hard, I know.
Answer: PIPLUP
Explanation: A Piplup figurine released during the height of the wait for the English names of the fourth generation Pokémon had the name 'Pochama', its Japanese name, on it rather than the English name, resulting in a bit of confusion where a number of major websites declared that 'Pochama' was the confirmed English name.
Answer: CLOYSTER
Explanation: This is referring to the shiny. The ordinarily light purple shell is blue on a shiny Cloyster, but the dark purple face inside the shell is the same.
Answer: GROWL
Explanation: A whopping 97 Pokémon learn Growl by level-up (or start with it) in some game. It is surpassed only by Tackle, which is learned by an amazing 156.
Answer: ASSIST
Explanation: Assist calls upon a move known by a Pokémon on your team. Normally you can call upon any move on your team, even if the Pokémon that knows it has fainted, but in Colosseum this was not possible. It is possible in all other games, however.
Answer: THUNDERBOLT
Explanation: Thunderbolt is always wiser to use than Thunder except during Rain Dance, where Thunder will always hit (as its normally low accuracy is its main weakness).
Answer: PSYCHOSHIFT
Explanation: The Synchronize ability causes the opponent to be afflicted with status effects as well when it inflicts some on you. Psycho Shift will actually remove your status effects and put them on the opponent instead, making it better. On the downside, it's a move, so you need to actually manage to use it, rather than being an automatic effect.
Answer: PALKIA
Explanation: Well, the name always makes me think of polka.
Answer: DOUBLEKICK
Explanation: All the Nidos learn the Fighting-type move Double Kick by level-up.
Answer: MEMENTO
Explanation: Memento makes the user faint and then sharply lowers the opponent's Attack and Special Attack. However, since when a Pokémon faints, any Mean Look it may have used is cancelled, the opponent will simply be able to switch out when you send out a new Pokémon except in some exceptional situations.
Answer: UTURN
Explanation: The Japanese name of this Bug-type attack, Tonbogaeri, translates to 'Somersault'; however, when the game was officially translated to English, it was translated as 'U-Turn', which more brings to mind images of cars.
Answer: PONYTA
Explanation: Unown's National Pokédex number is 201. This is also Ponyta's Johto dex number.
Answer: RAZORLEAF
Explanation: Razor Leaf has 55 base damage and a high chance of a critical hit. In Gold, Silver and Crystal, Chikorita learns Razor Leaf as early as level eight, and as it is a starter, it is one of the earliest moves somebody who starts with Chikorita will become able to control. Considering that, it is surprisingly powerful.
Answer: FIORE
Explanation: Fiore, the region of Pokémon Ranger, contains only four towns - Summerland, Ringtown, Fall City and Wintown, referencing the four seasons.
Answer: CYNTHIA
Explanation: For the first time in D/P, the League Champion - the most powerful trainer in the world, at least until the player came along - is a woman, namely Cynthia.
Answer: PHIONE
Explanation: Manaphy is supposedly the "Prince of the Sea", and as Phione is obtained by breeding Manaphy, it can be considered a member of its family...
Answer: SNOVER
Explanation: Female Snover have more snow on them than the males.
Answer: INSECTPLATE
Explanation: The Insect Plate turns Arceus into a Bug-type. Bugs are generally not considered to be the godliest of all creatures.
Answer: MESPRIT
Explanation: Alone out of Sinnoh's legendary trio, Mesprit runs around the region to appear randomly in different routes as Raikou, Entei, Suicune, Latios and Latias have done previously.
Answer: BICYCLE
Explanation: In the first and second generations, we had one bicycle. In the third, there were two, but in the fourth, there are essentially two bikes in one that you can switch between on the ride.
Answer: JUPITER
Explanation: Jupiter's haircut oddly resembles Medicham's head. It's not one of her Pokémon, though, so it's most likely a coincidence.
Answer: EIN
Explanation: The 'Ein Files', from which you learn everything about shadow Pokémon and purification in Pokémon Colosseum, are scattered all around Orre. One would think that such vital files would be placed somewhere where some random person can't just pick them up...
Answer: MARS
Explanation: Jupiter, Saturn and Cyrus himself all battle you exactly twice in the game, but Mars battles you three times in all for some reason.