Board Thread:New on Monster Hunter Wiki/@comment-64.9.15.50-20130222195519/@comment-5923841-20130303005308

The armor from the demo that you get with the longsword? I'm uncertain what armor set it is, but yes that armor set--including the awesome hat--will be in the game. Every other weapon and armor set in the demo is in the full game, no reason for that one not to be. More importantly, they wouldn't have bothered to create a whole armor set for JUST the demo.

Also the 3ds and WiiU versions have identical content. The only differences are how they do multiplayer and the controls. So yes, all monsters/ weapons/ armor/ quests avaialable on one version will be available on the other. (Plus you can transfer your save between the 3ds and WiiU, so no way would they have you lose any progress or equipment in the transfer.)