Ultraman: Transmigrating as Zetton, I Evolve by Killing Monsters

The protagonist was driving when a heavy truck rear-ended him, and he transmigrated. He became Zetton, at a point in the timeline when Belial had stolen the Plasma Spark Tower and gone to the Monster Graveyard to revive 100 monsters. The protagonist can evolve by killing monsters, so he sets out to kill them and evolve until he becomes Neo Zetton.