Monkey Hero

A little known action RPG developed by Blam! in 1999 for the Playstation. It plays very similar to The Legend of Zelda and Secret of Mana. You control Monkey, a, well, monkey who must defeat the Nightmare King, who is trying to take over the Waking realm. In order to defeat the Nightmare King, Monkey must collect all the pages of the Magic Storybook, which are scattered in dungeons all over the world. The game was inspired by Journey to the West.

Tropes used in Monkey Hero include:

Action RPG
And I Must Scream: The Great Dragon in Dragon Mountain. Also the fate of the Nightmare King in the ending, being sealed forever in a book. It's even shown he's still conscious.
Big Bad: The Nightmare King. Duh!
Creepy Cemetery: The Mausoleum.
Death Mountain: Dragon Mountain.
Dream Land: The Dream Realm, apparently.
Everything's Better with Monkeys: The main character, also the monkey soldiers.
Final Boss Preview: Played with. The first boss you fight is the Nightmare King (or at least his head), but you actually CAN defeat him, and quite easily too (this is justified, since the boss fight takes place in the Waking realm). However, he scatters the pages of the Magic Storybook upon defeat, thereby kicking off the main plot of the game.
Heart Container: The Magic Big Peaches you collect are pretty much the monkey hero equivalent of Legend of Zelda's heart containers.
Heroic Mime: Averted, despite being a The Legend of Zelda clone. Monkey occasionally speaks throughout the game.
Hyperactive Metabolism: The pie pieces which restore 8 peaches of health and also the mushrooms which not only fully restores your health but also doubles as an Auto Revive
Infinity+1 Sword: The Dream Staff which is obtained when you collect all 20 dream crystals
Interchangeable Antimatter Keys: Due to being a Zelda clone
Invincibility Power-Up: The Guardian Statue which makes you temporarily immune to almost all forms of damage (You can still be damaged by falling into a bottomless pit though), but is a permanent inventory item which costs coins to use and can be used at any time.
Let's Play: Believe it or not, there's one by Gavaroc here.
MacGuffin: Arguably, the pages of the Magic Storybook.
Mooks: The Nightmares.
Noob Cave: The Mines.
Palmtree Panic: Sandy's Beach, which is also home to a dungeon called "The Ruins"
Playable Menu: The Main Menu is represented by three rooms you can enter called "Load" ,"Start" and "Options". You can't use any of your items/equipement here but you can fiddle around with the sound and volume in the "Options" room by pushing two slides.
Shout-Out: The password that Sandy creates for you to enter the spaceship is |Klaatu. Also, the whole game could be considered a Shout-Out to The Legend of Zelda and Journey to the West.
Simple Staff: The bamboo staff, the rock staff and The Dragon Bone staff, The metal staff and the dream staff
The Maze: The Bamboo Grove, which must be navigated to order to find a dungeon.
Underground Level: The Mines which is also the very first dungeon in the game.
Warp Whistle : Monkey can use his cloud to warp to areas he previously visited, similar to Sūn Wùkōng's "somersault cloud" in Journey to the West.