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>Giant Pokemon can very rarely spawn (more rare than shiny, no way to boost it), fully evolved and with boosted stat spreads to rival pseudo-legendary pokemon, allowing you to use some of your favorites with better stats
>Pokemon can appear with varying color differences, such as darker or lighter tones and altered markings, using the same method that Spinda uses for its unique spots
>Special pokemon with unique appearances, such as Pink Butterfree and Crystal Onix, are found in post-game areas with fun side quests leading up to them. "The Mystery of the Pink Butterfree!" and "The Crystal Cave Pokemon!", or similar cheesy mission titles included.