Popular anime is also a limitless source of groanworthy puns. The original Japanese language version that has the best (worst?) of these - and what kind of an anime fan would watch a dub, anyway?
Buton wa buton ga buttonda. (The pig hit the pig. DBZ)
Ah...Pan da. Kochi mo Panda! (Ooh! It's bread. I am also a panda!? Ranma 1/2)
Neko ga, nekonda. (The cat is sleeping. DBZ)
Futon ga futtonda. (The bed flew away. DBZ. Sensei mentions this in the first writeup, too.)
Hei! Gaaru? Rimembaa mii? Aimu 'Sutaamii')? (Hey! Girl? Remember me? I'm a star, me. Pocket Monsters)
Eternal gratitude to jarsyl for the translation of the Ranma 1/2 line.