These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Breather Level: The first level of area four of Super Bonk is just Bonk drifting around in space looking for the Hatchet's base. The only thing that can hurt him is this level is the sun (which you would have to let Bonk drop to the bottom of the screen for it to hurt him), and there are a few health upgrades strewn about.
All of Super Bonk is easier compared to the previous games.
Contested Sequel - While fans differ on which Bonk game is considered the best, most considered Bonk 3 the weakest entry in the Turbo Grafx series.
Both Super Bonk games are also considered to be weaker in comparison to previous titles.
Fridge Logic - How did King Drool create a time machine considering the time period in which the series takes place?
Fridge Brilliance - In addition to sounding like PC-Engine, PC-Genjin translates into "PC Barbarian", fitting considering the title character.
Goddamned Bats: The piranhas will latch on to you and slowly drain your health until you shake them off. Also, any enemy that can swallow you whole, forcing you to play through a small level every time just to get out.
Harsher in Hindsight - The teaser for Brink of Extinction showed Bonk trying to create fire, only for a meteor to obliterate Bonk (and the Earth as well). Now it seems to sum up what ultimately became of the game. See What Could Have Been on the Trivia page.