Party Animals featured many cameos of TV Doctor Who characters, comic Doctor Who characters, Marvel comic characters, and characters from other Britsh comics and popular shows.
I haven't been able to identify the ones with number numbers *above* their heads:
1. Female superhero with Cyclops
2. Insectoid alien?
3. Reptilian alien arm wrestling Worf (Mister Fish?)
4. Obscured superhero with Hulk.
5. Obscured hobo with beard/mustache
9. Kid with triangles on clothing
10. Short alien with sombrero
11. EDIT: Cheetah Person
12. Humanoid male
13. EDIT: Alien Guard member in the Iron Legion