User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-186.145.130.238-20120221145408/@comment-3005793-20120221211311

Frontier is a special case, because of the fact that its a computer game. Handhelds don't have enough memory to have all the monsters. Consoles could technically support a game with all the monsters, but consoles have a relatively short life cycle, so spending so much time making a game with all the monsters in it is financially unfeasible. Computers have the longest life cycle of all, have the largest consumer group, and are relatively easy to update, for with new monsters and such. The only thing holding them back are, like Dippamus said, departmental issues.