Issue: #21
The first rule of the All Pet Club issue is: Please tell everyone you see today about the All Pet Club issue! The second rule of the All Pet Club issue is: Please tell everyone you see tomorrow about the All Pet Club issue! After all, it's not just Pet Club – it's Pet Club in space!
First appearances: F.E.L.I.X., M.A.X., Poopu
Creators: Art Baltazar, Franco Aureliani, Simona Martore, Elisabeth V. Gehrlein
Characters: Alfred Pennyworth, Dick Grayson, Superman, Martian Manhunter, Barbara Gordon, Ace the Bat-Hound, Hal Jordan, Barry Allen, Cyborg, Beast Boy, Raven, Starfire, Blue Beetle (Reyes), Hoppy The Marvel Bunny, Supergirl, Supergirl, Freddy Freeman, Donna Troy, Krypto, Ray Palmer