After completing the Tower of Despair and every other course in the game (bar temporary dungeons), you unlock your final final final test - The Final Tower! It's a Tower of Dread/Despair type tower that hosts monsters, all of which have faces from the Mii cast that weren't stolen before! After saving each face, there is a cutscene where the Mii gets their face back, and thanks you (most of the time). *High difficulty alert*
The Monsters are...
"Worried Mother" Slime - Red slime with the Worried Mother's face on.
Wild "Lovey-Dovey Man" Mouse - Wild mouse with the Lovey-Dovey man's face on.
"Dubious Mayor" Goblin - Goblin with the Dubious Mayor's face on
Butterfly "Serious Solider" - Silvery black butterfly with the Serious Solider's face on.
Naughty "Lax Solider" Imp - Naughty Imp with the Lax Solider's face on.
"Left Royal Support" Golem + "Right Royal Support" Golem - 2 Golems with the Royal Support Guards' faces on them.
"Prince of a Nearby Land" Griffin + General "Bersmiched Noble's Son" - Griffin and General with the faces of the Bersmiched Noble's Son and the Prince of a Nearby Land.
Robo"Rambling Old Man" - Robot boss with the Rambling Old Man's face on.
Cactus "Prickly Wife" - Cactus ball with the Prickly Wife's face on.
Twerk"Green Eyed Lady" - Twerkey with the Green Eyed Lady's face on.
Dark "Lazybones" - Dark Lord Replica with the Lazybones Elf's face on.
Darker "Town Guide" - Replica of the Darker Lord with the Town Guide/Well-informed Bod's face on.
"Scholarly Pioneer" Sun - Yellow Sun with the Scholarly Pioneer's face on.
"Roving Photographer" Camera - Camera with the Roving Photographer's face on. Can use "flash" to blind teammates.
"Quizmaster"mark - Giant questionmark with the quizmaster's face on. Can distract teammates by "making them think".
"Prodigious Postman" Letter - Giant letter with the Prodigious Postman's face on. Attacks pretty much the same as "painting" enemies, only it's special attack is sending floods of letters from itself, damaging the party similar to Wicked Pitchforks.
"Roaming Gourmet" Mii Trap" - A Mii Trap with the Roaming Gourmet's face on.
"Nintendo Fan"ba - A monster that looks like a Goomga from Super Mario with the Nintendo Fan's face on.
"Worried Explorer" Snurp - A Snurp with the Worried Explorer's face on.
Giant "Reborn Mii" Slime - The final boss. A ginormous version of the Mini Slime from the beginning of the game, with the Reborn Mii's face on it. It can attack all teammates at once just with it's normal attack, as well as summon random monsters from across the game to aid it.
After defeating the final boss, there is a cutscene where the Reborn Mii thanks the player for saving them again, before the Great Sage cones to pick the Reborn Mii up, saying that a monster had brought him up to the Tower. As a thank you gift, the Great Sage gives you a Charm which unlocks a really powerful job (I haven't decided what yet). He then leaves with the Reborn Mii, and the party go back to the Inn, as you are awarded a golden medal.