Here is what Terrus would look like as an Arcanine transformed that is.

He became an Arcanine when he was experimenting trying to find out what their DNA looks like.
And then soon he ended bonding what their DNA possibly looked like with his own.

Yes he is very similar pokemon traits by carrying an ability and carries a variety of attacks and they are

Ability: Flash Fire
Attacks: Bulldoze, Fire Blast, Fire fang, Flamethrower, Flame wheel
Flare blitz, Giga Impact, Heat wave, Incinerate, Overheat, Rock smash,
SolarBeam, Strength, Sunny Day, Thunder Fang, Wild Charge, & Will-o-Wisp
(Why more than 8 moves cuz FUK U DATS Y)

Arcanine Terrus © Myself
Art is ©  Silver-Scarecrow (with permission)