Boss token

You can drop them from Mega pokemons.
NPC can be met at PApoi Quest in a room with 4 teleports.

00:10 Tom Hoppus: Currently I have the following reward(s):
00:10 Tom Hoppus: random tm case box for 150 boss tokens.
00:10 Tom Hoppus: random ball box for 50 boss tokens.
00:10 Tom Hoppus: dungeon key box for 20 boss tokens.
00:10 Tom Hoppus: [random held item box 1] for 150 boss tokens.
00:10 Tom Hoppus: [random held item box 2] for 200 boss tokens.
00:10 Tom Hoppus: sunrise town residency permit for 80 boss tokens.