User blog comment:Plexioth- xD/Monster Hunter 3 Ultimate/@comment-199.19.248.52-20121002132254/@comment-3062343-20121002215844

If you have both Shakalakas with you, or there are multiple large monsters in the same zone, the framerate suffers a bit. It's not like it becomes unplayable or anything, but it's one of the reasons I never bring the Shakalakas on quests (the fact that they're completely useless and actually make quests take longer is probably a bigger factor though).