When people search for "Monster Hunter 3 Ultimate Cemu hot," they are often referring to two things: the "hot" trending mods or the physical heat generated by their PC hardware during emulation.
You generally need to play on private servers (like Pretendo Network) because Nintendo's official servers for Wii U are shuttered.
MH3U is notorious for crashing during the "Save" screen or when entering Moga Woods.
. While official servers for the Wii U and 3DS versions have long since closed, the Cemu emulator