Hmm...I'm waiting to see on what the refined implementation of Mega Evolutions will be on Bulbapedia, but I'm more of the opinion that they should have their own articles (or "sub-pages", like the PWT article has with certain tourneys) (mainly to detail exactly what the changes are compared to the "pre-evo" of the Mega Evolution) while still being mentioned in some areas of the original "species" page (such as in the "Evolution" flowchart section). The Mega Evolutions don't seem to be consistent (some retain original typing yet change Ability, some change typing but retain Ability, some change BOTH typing and Ability, not to mention how lots of the movesets and Base Stats are potentially altered), and the species pages are getting longer with more information already.
I'm happy that my english has been good enough to make my opinion come through!
I really agree with you, they really should have their own page with personalized template, artwork and so on.
Thanks for answering! I hope that someone of the staff will take into consideration it too!