Analysis of information sources in references of the Wikipedia article "Coco Bandicoot" in Simple English language version.
The only thing we weren't able to squeeze into the game was Coco as the second playable character in coop mode. It's not her character model that's the problem, but animations. To make Coco believable as a platforming, fighting character we felt she needed her own combat style and moves. It would have looked too weird if she moved the exact same way Crash does. And so she has her own animations. She looks great, but animations take a lot of memory.
When you play a level as Coco instead of Crash, there's no explanation or warning given--you'll simply enter the level's portal as Crash and come out the other end as Coco. It's not all bad, but compared with Sunshine, it seems very uneven.
Crash isn't alone in fighting the forces of evil. He's assisted by Coco, a less powerful and less enjoyable playable character. Coco pops into specific levels and must be used to pass that area. She's just not fun the way crash is. Crash is a silly creature to look at. He's almost absurd, which works great with his various animations. Coco isn't really silly at all. The game isn't called Crash and Coco so why must I be forced to play her? Rather than add variety, Coco detracts from the only real selling point of the game -- Crash Bandicoot.
A friend can join in on the same system, too, with drop-in cooperative play. In this mode, they can play a second Crash-like character or his sister, Coco.
The only thing we weren't able to squeeze into the game was Coco as the second playable character in coop mode. It's not her character model that's the problem, but animations. To make Coco believable as a platforming, fighting character we felt she needed her own combat style and moves. It would have looked too weird if she moved the exact same way Crash does. And so she has her own animations. She looks great, but animations take a lot of memory.