Okay this should be pretty simple. For each color, what is the first Pokemon that comes to mind? It could be because of typing, or the pokemon's color. or some really weird reason! I'll give an example:
Red: Voltorb
Orange: Charizard
Yellow: Mareep
Green: Treecko
Blue: Marill
Purple: Arbok
Pink: Snubull
Brown: Teddiursa
Grey: Kyurem
White: Reshiram
Black: Umbreon
These were all answered within like 5 seconds, so they're very much just a first thought. Now don't think too much about your choices... go!