I have covered a couple of these topics before but here they are complied with some new ones. I will not include monsters that were reused later because there are too many to mention.
Abarepink / Orange Ranger
In Abaranger (2003), Abarepink was a friend of the gang dressed as a fan-made pink ranger. This concept was not used in Dino Thunder. In SPD (2005), Boom made his fan made Orange Ranger costume.