>>31213791Your logic falls apart in infernape's case because a fire starter in Sinnoh would already be set for major portions of the game, fighting is a cherry on top
>large grass/bug area>huge ice mountain>half of the game's gym leaders are weak to fire/fighting, while the piplup line only catches a break in the first gymEmboar also had no good reason to be fighting type, since its typing is SE on three of the unova gyms while Water and grass were only effective on one gym each. On top of this Unova has only two rock type lines that appear in the wild if I recall correctly, Roggenrola and Seismitoad.
Blaziken seems to be the only Fire/Fighting type that really needed some sort of edge over Hoenn, because most of Hoenn is water. Fighting doesn't circumvent that, but it still helps in a few places.