Monster Hunter Generations Ultimate will allow cross-play between 2 platforms

Monster Hunter Generations Ultimate
Crossplay platforms
Release Date: Aug 25, 2017
Official Website: Link
Crossplay platforms:
Monster Hunter Generations Ultimate will support cross-play across multiple platforms. It will be possible to play together with your friends on Nintendo Switch and Nintendo 3DS. Please check out all the details on the game's official website!
Summary:
An enhanced version of Monster Hunter Generations. It features new monsters, hunting styles, and the more challenging G-Rank quests. Game data from Monster Hunter Generations can be carried over, with a one way transfer, to Monster Hunter Generations Ultimate. Game data can also be moved between the 3DS and the Switch version of the game.

Screenshots:
Artworks:
Monster Hunter Generations Ultimate is also known as:
  • MHXX
  • モンスターハンターダブルクロス
  • Monster Hunter Double Cross
Supported game modes:
  • Single player
  • Multiplayer
  • Co-operative
Supported player perspectives:
  • Third person