The Diloweed, Phlask and Vectol lines were the last evolutionary lines to be confirmed.
The Diloweed line was the last evolutionary line to not have any sprites.
The final design for Diloweed was made by a different artist than the design for Pangolash. Both artists also created designs for the other Pokémon in this evolutionary line, which lost to the other artist's design.
Pangolash was originally not related to Diloweed, and was originally not part Grass type.
The Diloweed line was the only Pokémon sage Pokémon that made it past a concept stage that was considered to be culled.
Pangolash is based on a pangolin whose plates are made of hardened steel.
Pangolash's name is a combination of pangolin and slash.