I have Chruser in mind.

29. I guess it Batman ? Close.
28. Is it very large? No.
27. Does it produce heat? No.
26. Is it used by the police? No.
25. Is it dangerous? Probably.
24. Is it a wild animal? No.
23. Can it growl? No.
22. Does it live in groups (gregarious)? No.
21. Can it run fast? Probably.
20. I guess it a neanderthal? No.
19. Does it swim? Yes.
18. Have you seen one in real life? No.
17. Does it perform? Doubtful.
16. Does it come in many varieties? No.
15. Is it comforting? No.
Does it help accomplish tasks? Unknown.
14. Is it useful? Probably.
Does it like to run? Unknown.
13. Do you know any songs about it? No.
12. Is it multicolored? No.
11. Do you use it at night? No.
10. Can it cheer you up? Probably.
9. Can you lift it? No.
8. Does it bring joy to people? Probably.
7. Is it considered valuable? Doubtful.
6. Can you play with it? Probably.
5. Does it stand on two legs? Yes.
4. Can you see it in a zoo? No.
3. Is it small? No.
2. Does it have claws? No.
1. It is classified as Animal.