In Kingdom Hearts 1, a red trinity can be found inside the (*SPOILER ALERT* even though the game has been out forever now) Oogie Manor in Halloween Town. Once one knows the location, it is easy to spot out but if one were me as a kid, the only thing in mind would be to just fight Oogie, missing the trinity.

(*SA*) The whole Manor is destroyed after the final Oogie fight. Since the trinity was attached to the manor, if the trinity isn't activated, it will never be. This causes the player to not complete 100% of Jiminy's Journal, not achieve the secret ending, and being mad that the player realized this trinity while his sister was playing.

This was fixed in KH Final Mix by placing the trinity mark on the floor after the final Oogie fight. No more will have to suffer not achieving the secret ending.

I guess you can say that it took me an eTRINITY to start the game OOGer once I realized I MANOR missed one.

(Some might say that it makes no sense but MANOR is suppose to be like might of, i know still bad either way)