- Konami Man and Konami Lady: Jack-of-All-Stats characters that can fly if you find a cape Power-Up
- Goemon from Ganbare Goemon! Karakuri Douchuu: He attacks with a tobacco pipe that allowed him to hit opponents, but cannot hit down. He can also open treasure chests.
- Simon Belmont III from Castlevania: He uses a whip that can attack farther, but is slower.
- Mikey from The Goonies: He is the smallest character, which allows him to in areas the bigger characters can't. However, he has a weak attack.
- King Kong from King Kong 2: Ikari no Megaton Punch: He has the strongest attack and can break through blocks. However, he is the heavy which will cause Floating Platforms to fall and cannot acess certain areas.
- Fuuma from Getsu Fuma Den: He can fire three shurinkens at once. Said shurinkens can break though destroyable blocks.
- Moai from Moai Kun: He uses a head butt attack that can break destroyable blocks and can take the most damage.
A sequel, Wai Wai World 2: SOS!! Parsley Jō, was released for the Famicom in 1991. In this game a new protagonist, Rickle, takes the spotlight, with the ability to change into Goemon, Simon Belmont and Fuuma, and newcomers Upa from Bio Miracle Bokutte Upa and Bill Rizer from Contra. The gameplay here is much more linear and lacks the Metroidvania aspects of the original game, but there are still a few branches and several Unexpected Gameplay Changes.
Wai Wai World was released for mobile phones in 2006. However, King Kong and Mikey (and their stages) were removed for licensing reasons. They were replaced by Penta from Antarctic Adventure, and the before-mentioned Upa (who got their own stages to replace the missing ones).
Examples found in Wai Wai World:
- All There in the Manual: Konami-Pub Wai Wai World Guidebook and Tokuma Shoten Wai Wai World Guidebook reveal the name of the Castlevania hero is Simon Belmont III.
- Astral Finale: Both games conclude in outer space in some way.
- Battleship Raid: One of the boss battles in the sequel is against a gigantic Core Ship, which has defenses that must destroyed before getting a chance to break into the core.
- Breakout Mook Character: Moai was originally an enemy from Gradius.
- Co-Op Multiplayer: The second game allows the control of two Rickles- one red and the other blue.
- Crossover: Of Famicom Konami characters.
- Eenie, Meenie, Miny Moai: One of the heroes in the first game is a friendly Moai statue on legs, and it's stage, fittingly enough, is loaded with Moai statues.
- Giant Space Flea from Nowhere: The last area of the game has you fighting aliens. And the insides of one.
- Guest Fighter: In a way, Mikey and King Kong in the first Wai Wai World, being non-Konami characters.
- Improbable Weapon User: As in his home series, Goemon uses a tobacco pipe as a melee weapon.
- Level Ate: In the mobile version, Upa's stage is this, with enemies and tiles directly lifted from Bio Miracle Bokutte Upa
- The Medic: Dr. Cinnamon (from the Twinbee games) will refill a character's energy bar.
- Metroidvania: Some levels require the use of a certain character to progress, such as needing Mikey to progress through King Kong's stage or needing Konami Man/Lady's ability to fly over a high ledge or King Kong to jump over it outright in Fūma's stage.
- Original Generation: According to two guidebooks, the hero of the Castlevania world is Simon Belmont III, Simon Belmont's descendant.
- Planet Heck: Hell is a level in the first game, based on Getsu Fūma Den.
- RPG Episode: One level of the second game is titled "Final Twinbee Quest Gaiden!?" The joke is that it's a TwinBee-like shmup level, but set in a stereotypical Eastern RPG World Map and dungeon.
- Unexpected Shmup Level: The first game has a shmup level towards the end, where the player is given the choice of flying either Vic Viper or TwinBee. The sequel has a short one in the middle of the first world and then later stages in the style of TwinBee and Gradius.
- Womb Level: The final stage in the first game is a large hellish-like alien lair taking place inside the head of the boss you just defeated in the Shmup stage. Here, you are attacked by the organism's defensive system, including blood cells, antibodies, and chromosomes. What awaits at the end is a three-headed Eldritch Abomination.