Spinda: Like PMJ said, Spinda is a novelty Pokemon. It could use one, but I wouldn't really want it to have one.
Absol: Stat wise, yes. Appearance wise, not-so-much.
Mantine: Mantine is already very big, and I don't think that they could make a Pokemon-like Pokemon out of it's evolution. Of course, they did it with Rhydon, but still....
Actually i said those because they are in pokemon flint.But:
Mantine-Fills the sky,happy face!
Absol-Vicous and good stats,like weavile did.
Spinda-weak.But then he becomes a dizzy giant panda.
hmmm.... could anyone see a hitmon stage2 or new evols of tyrouge? And if bellossom was a basic(which it should have been!) could you think of an evolve for it?
Well, let me see...
Parasect evo possibly? uhh... Paraschupt? Bug/Grass
Dunsparce... hmm... Navyoam? Ground
Chatot... Gossot (XD) Normal/Flying
Kambless --> Nosepass Normal/Rock Innocense (only attacks that have a base power 50 or under do damage against Kambless, Dont worry, he has bad Defense and Special Defense)
well on the show, Lugia has a baby(its name is silver) so why not in the games?
About the Tauros/Miltank baby idea:
Tauros and Miltank are two different species. I have a female tauros and on these standards, it should be a Miltank! While the idea is good and all, it just would'nt work
MY LIST OF POKEMON THAT NEED EVOS
Lumineon
Pinsir
Dunsparce
Heracross(its tough, but it could be tougher)
Spinda
Scizor
Kricketune
Banette
MORE EEVEE-LUTIONS
Lucario