A Monster Who Levels Up. Though I feel I must warn you the last few chapters and the ending itself are quite dumb. Not completely unfulfilling just dumb.
on RRL; Cheating Monster, RE;Ocean. And i'm sure you've already read RE:Hamster with Weedy, the best evolution process ever 'FatHeerr!' On NU, Death Mage.
A Snake's Life and a Snake's Rise on RRL: Evolving snake, he gets massive size problems in the second book. Re:Ocean, MC becomes a squid monster that evolves , you know what comes next.