* FollowTheLeader: ''Bubble Bobble'' has a few arguable imitators, ''VideoGame/SnowBros'' and ''VideoGame/SabotenBombers'' to name a couple.
* KeepCirculatingTheTapes: The source code for the original arcade game has been lost, forcing ports to try to recreate the physics from memory with varying degrees of success (the [[UsefulNotes/SegaMasterSystem Master System]] version is said to be the closest).
* PortOverdosed: ''Bubble Bobble'', ''VideoGame/RainbowIslands'' and some games in the ''Puzzle Bobble/Bust-a-Move'' series are exceptionally widespread games, having appeared on virtually everything able to play games since their initial releases--which includes, in ''Bubble Bobble''[='=]s case, every home computer of the 1980s.
* PropRecycling: Curiously, the bubbles around the player characters (used for level transitions) in the two ''Part 2'' games (''2'' for NES and ''Junior'' for Game Boy) are the same size in pixels, even though the characters themselves are of different sizes.
* ScheduleSlip: A port of ''Parasol Stars'' for Nintendo Switch, Xbox One, [=PlayStation=] 4 and [=PlayStation=] 5 was planned for 2023, but got delayed for unknown reasons.
* WhatCouldHaveBeen:
** ''Bubble Symphony'' has a DummiedOut witch boss, a giant female Dranko on a broomstick, who doesn't appear in the final game for whatever reason. Then again, a Dranko does appear in one of the bad ending cutscenes.
** Also, the dumped prototype of ''Symphony'' shows the game was going to use a rendition of the original Bubble Bobble theme as main theme, which got used as a "secret" theme for the Classic Mode cheat in the final version.
** ''Parasol Stars'' almost had a Commodore 64 port, but [[https://www.gamesthatwerent.com/gtw64/parasol-stars/ the developer's alcoholic wife destroyed his computer and all the backups for the game in a drunken rage.]] Out of respect for the developer and his personal life, Ocean initially claimed his computer was stolen in a burglary.
** In the official announcement trailer for ''Bubble Bobble 4 Friends'', the bubble dragons are displayed with their longer names and are named after the roster of ''Bubble Symphony'': Bubblun, Bobblun, [[SuddenNameChange Cururun]], and Cororon. In the final version, they go by their shortened names from ''Bubble Bobble Plus!'': Bub, Bob, Peb, and Pab.
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