Certification
- Australia:PG
- Canada:C8
- Canada:PG (some airings)
- Ireland:PG
- Japan:PG12
- Malaysia:P12
- New Zealand:PG
- Singapore:PG
- United Kingdom:PG
- United States:TV-Y7
- United States:TV-14 (Adult Swim airing)
- United States:TV-PG (Season 3)
- United States:TV-Y7 (original rating)