I am going to be the first to say it; Bandai sucked at making games for the longest time because their main focus was toys and television.

With that said, it seems as though the newest Pokemon trends have prevalent in Digimon since about three- four years after their inception.

>Mega Evolution
https://www.youtube.com/watch?v=BXvzpClm0VQ
near the end of the video

>Ultra beasts
http://wikimon.net/D-Reaper
http://assets.rpgsite.net/images/images/000/037/973/original/DCS_Jun012015_30.jpg


>Mimic Monsters
http://wikimon.net/Omekamon
http://wikimon.net/Ex-Tyranomon
http://wikimon.net/Betsumon
http://wikimon.net/Toy_Agumon

>Elemental variants (regional variants for pokemon)
http://wikimon.net/Toy_Agumon
http://wikimon.net/Yuki_Agumon
http://wikimon.net/Black_Seraphimon

(Most are just used as enemies and are unattainable in most games)

Why is it acceptable when Pokemon does it, but everyone goes into an uproar when Digimon has been doing the same things for years?