The Legends Character Pack adds 5 characters (Toon Link, Tetra, King Daphnes, Linkle, Skull Kid), the season pass adds another 4, and then there's Medli. So that's 10 additional characters compared to what Wii U users currently have.
There are 29 characters in all, plus a bunch of extra weapons that are technically unique characters in and of themselves.
- Link
- Zelda
- Sheik
- Impa
- Ganondorf
- Darunia
- Ruto
- Agitha
- Midna
- Fi
- Ghirahim
- Zant
- Lana
- Cia
- Volga
- Wizzro
- Twili Midna
- Young Link
- Tingle
- Toon Link
- Tetra
- King Daphnes
- Linkle
- Skull Kid
- Medli
- Link's Awakening character
- Phantom Hourglass/Spirit Tracks character
- A Link Between Worlds character 1
- A Link Between Worlds character 2