Just to double check, so I'm not wasting my time with the pet zapper trying to get the colour achievements: the only colours it can't do, are Angelic, Hydrus, Galactic, Nostalgic, Steamwork and Sweetheart, right?

So Harvest and Aqua are possible with the zapper?

Sometimes it's easier to stalk the pound for some colors... :'D

Aqua is colorfill and should be possible with the zapper. I'm not sure about Harvest and Sweetheart, but the others listed are not zappable as far as I know.

Hi. Sorry to barge in, but I'm asking the same thing, sorta, and didn't want to make an other board. Do experiments have to be zapped into chibi, or you can use a chibi potion on the ones that have the chibi option? So I won't waste a potion, you know...

Yeah, experiments function like any other pet once you've got one. If you have a common one (or scribble or whatever) and a chibi version is available, then yes you can use the potion to make it chibi.

Awesome, thank you much :)

Quote from the Frequently Asked Questions & Answers, kept up to date by staff and official and stuff:

Pet Zapper: You can take your pet to the Ultimate Pet Zapper (located in the Darkside) and have it randomly zapped into other colors or species. Do be aware, however, that the pet zapper can also change your pet's gender, raise stats or do nothing at all... so use it at your own risk! NOTE: You can NOT obtain Angelic, Hydrus, Galactic, Nostalgic Steamwork and Sweetheart via the zapper

Harvest and Aqua are not excluded and this is not accidental, it's exceedingly rare for the FAQ to be wrong. If you think it might be you are better off asking via a Ticket in Help and you'd be helping everyone else here too if they make a correction.

An Experiment is a species just with limited colors. You can use Potion of Purity, Common Potion, and Chibi Potion on them.