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.
YMMV: Godzilla Destroy All Monsters Melee
Ensemble Dark Horse: Every monster in the game has its fanbase, but Biollante is probably the prime example after being axed from appearing in Save The Earth.
The Final Wars redesign of Gigan in Unleashed is definitely this.
Game Breaker: Destroyah's Horn Katana in Unleashed can chop health bars to bits, especially the overhead swing.
Rescued from the Scrappy Heap: While not received very well in the similarly ill-received Godzilla vs. Megalon, Jet Jaguar has since found redemption in the eyes of fans through Save the Earth and Unleashed where he is a very fun character to play as and has fared better overall.