Long story short, the latest in the "cutePikachu" Pokémon spinoff series, and perhaps the one with the highest production values: instead of being a virtual pet, it's more of an action/adventure game for little kids.PokéPark Wii: Pikachu's Adventure stars our favorite Pokémon, Pikachu, as the main character. Mew has asked him and his friends to help repair the Sky Prism that powers Mew's home, the Sky Pavilion. The Pavilion floats high above the PokéPark, where many Pokémon live and come to play: the friendship and love among the Pokémon of the park sustains the Prism, and without it, the Pavilion will fall and crush the PokéPark below. Pikachu can befriend other Pokémon, thus helping to restore the Prism, by doing favors for them, or proving himself in Skill Games with them.The game has a sequel, PokéPark 2: Wonders Beyond, which got released on the Wii (in Japan, it's titled Beyond the World) and featuring Pokémon from Black and White and multiplayer.
These games provide examples of:
After the End: The most lighthearted take possible on the trope, and only in the sense that humans have abandoned the theme park for Pokémon to take over. It's unclear if humans (not counting Cofagrigus) are still around elsewhere or not.
Easy Amnesia: Darkrai induces this in the other playable characters besides Pikachu in Wonders Beyond, causing them to lose their memories of Pikachu and their adventure. Luckily, a quick battle or game of Chase can bring them back to their senses.
Elemental Rock-Paper-Scissors: In the first game, the Pokémon you would expect are immune to Thunderbolt. The sequel's expansion of the battle system takes the full spectrum of type matchups into account.
Heroic Sacrifice: When Darkrai realizes his attempts to make Wish Park into the ideal world has only caused the world's balance to be disrupted and the Dark Vortex starts destroying both worlds, Darkrai takes Reuniclus' invention and enters the vortex to close it himself.
In-Series Nickname: Pikachu is nicknamed Lightning Strike by the Pokémon in the Lava Zone.
Pikachu and the Unova starters are referred to by a variety of nicknames in Wonders Beyond. Which nickname is used is dependent on the player's actions.
Laser-Guided Amnesia: In Wonders Beyond, anyone who stays in Wish Park seems to get this. Late in the game, Darkrai does this to Piplup, Oshawott, Snivy, and Tepig himself and Pikachu has to snap them out of it.
Lampshade Hanging: The Pokémon who teaches Pikachu Iron Tail is Primeape, who you may know to not have a tail. It's a lampshade on the fact that in the standard Pokémon RPGs, Primeape can learn Iron Tail from its pre-evolution, Mankey, who does have a tail. When Pikachu questions how he can know it, he basically says that he's just that good.
There's a Tyranitar that mocks the game's premise in the Granite zone.
Unsettling Gender-Reveal: After the main game is complete, a quick battle with Gothorita reveals that many Pokémon mistake him for a girl.
Video Game Cruelty Potential: To the other Pokémon: you can use your moves on them and watch them get hurt out of battle. Or, if you're feeling especially cruel, targeting bystander Pokémon while in battle with Iron Tail, or putting them into your opponent's line of fire.
There are several Pokémon, like Buneary and Pachirisu, who you can send flying several feet just by running into them.