SubZero said:Delta is not part of the name and therefore the names you are using are just reference, really that poke is just Gloom, it could also evolve into a bellosom (grass) or from a grass oddish. You have been misinformed.
PKM4 said:You can evolve d pokemon into non d pokemon. For example, Larvitar d can be evolved into Pupitar d or a regular fighting type Pupitar. A Pupitar d can be evolved into Tyranitar d, Tyranitar ex d, or Tyranitar ex.
Hope this helps.