Fuyuki wearing Keroro's afro
Fuyuki acting like Kururu
to complain about him in episode 28-B.
Fuyuki dressing as a girl to infiltrate a beauty contest in episode 326-B
Fuyuki as a goat in Wonderland.
Fuyuki's favorite underwear according to Tamama's imagination (episode 324-B)
Fuyuki had been switch bodies with Tamama