Oh my god I can't believe there's a thread like this! I'm going to improvise.
Look at this. Stare at it and it looks like a Dodou taking a crap with a Togikess watching.
ROFL, I'd sig that if it wouldn't ruin my signature set up.
My least favorite is Green Mew since it looks abnormal, and Red/Blue Golbat because of its tongue hanging out.