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They have that special way of making things look cuter than they really do! (although you have to admit the pika mouse is kind of cute)
There is (not in the right order sry) a real pikachu (eew) a mud puppy (mudkips real life counter part) a mudkip, a pikachu and a pika mouse.
In their underwear? just kidding! As for the hair, that would be a problem when you forget they are there " Where is that Pokemon!?!?!" But that would explain cacnea attacking james' head (even though hes not a galactic grunt)