Lion vs wigglytuff
Hmm... probably wigglytuff, the problem is pokemon are usually motivated to fight while the lion might not be...
lion vs blissey
Blisseys are powerful, and lions are overated as fighters anyway, they work better in packs.
grizzly bear vs blissey
Again, Blisseys are really powerful, 1 toxic and its pretty much over.
rhino vs clefable
Rhinos can be tough, but unless it had bad metronome luck, clefable would probably win, though it would take a wile since their both quite hard to hurt.
hippo vs blissey
A hippo would have a chance here, since hippos are massively powerful, plus Blisseys are weak to physical.
shark vs gastrodon
It would take a long time but I reckon the shark may just about win.
orca vs tentacruel
Orcas are sooo cool and powerful, but then again tentacreul is no pushover either, probably tentacreul as much as I hate to admit it.
cat vs meowth
Meowth. A Meowth is just everything a cat is but better (assuming you mean a house cat, not a lynx or a cougar)
rabbit vs igglypuff
Igglybuff. I suppose rabbits can put a bit of force behind a kick, but they cannot come close to any pokemon.
elephant vs bulbasaur
Hmmm, probably bulbasaur since anything with poison would have a good advantage.
elephant vs venusaur
See above but with more ponage
rhino vs snorlax
Snorlax, a rhino cant do much to something that can heal itself as easily as Snorlax can
rhino vs rapidash
Rapidash, it can BREATH FIRE!!!
polar bear vs walrein
Polar bear, their sooo strong and walrein wouldnt be able to do much to them, they can swim and survive massive drops in temperature.
orca vs walrein
Orcas would outclass walrein, it wouldt be able to do much to an orca plus their faster.
lion vs ralts
Probably lion, but if it's a smart Ralts and kept its distance it could win
wild boar vs cleffa
Wild Boar, even lions don't attack wild boar if they can help it
cat vs skitty
See cat vs. meowth
Answer these and you can freely go on and say your animal vs pkmn fights!