create implication splatoon_2:_octo_expansion -> splatoon_2

Link to implication

DLC from the game with new characters etc.
Don't know if the tag is really that necessary but if it were to survive then this implication should be done.

EDIT: The tag implication splatoon_2:_octo_expansion -> splatoon_2 (forum #143889) has been approved by @NWF_Renim.

+1

I created the tag since characters like Iida got a new costume.

The tag implication splatoon_2:_octo_expansion -> splatoon_2 (forum #143889) has been approved by @NWF_Renim.