When two characters are involved in a contest to prove their superiority. Although this generally doesn't include violence, it can involve it especially if it is in a lighthearted manner.
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Rivalry
633 posts1 sourceWiki updated 2/23/2025
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angel (kof)
king of fighters · by cirenk · rule34.xxx
natsuki (doki doki literature club)
doki doki literature club · by jellyfishjubilee · rule34.xxx
perhapsmaybe05
by perhapsmaybe05 · rule34.xxx
perhapsmaybe05
by perhapsmaybe05 · rule34.xxx
sonic the hedgehog
idw publishing · by a name for me · rule34.xxx