Certification
- Australia:PG (some episodes)
- Australia:M (some episodes)
- Canada:PG (Manitoba/Nova Scotia)
- Canada:14A (Ontario, season 1, DVD rating)
- Canada:G (Quebec, most volumes)
- Canada:13+ (Quebec, volume 8)
- Chile:I12
- Czechia:12 (Season 1-3)
- Czechia:15 (Season 4)
- Germany:12
- Hungary:12
- Japan:G
- South Korea:12
- United Kingdom:PG
- United Kingdom:12 (Season 1-3)
- United Kingdom:15 (Season 4)
- United Kingdom:12 (volume 1 & 4)
- United States:Not Rated
- United States:TV-PG