All right, Cancer Fairy's time to shine:
Pokémon: Zacian
Typing: Fairy (base); Fairy/Steel (Crowned)
Stats (changes highlighted in bold):
Base: 92 / 130 /
105 (-
10) /
110 (+
30) /
105 (-
10) /
128 (-
10) (BST:
670)
Crowned: 92 /
160 (-
10) /
110 (-
5) /
130 (+
50) /
110 (-
5) /
118 (-
30) (BST:
720)
Moves: Aura Sphere, Dark Pulse, Shadow Ball, Calm Mind, Nasty Plot, Thunder/Thunderbolt, Roar,
Hyper Beam, U-Turn
Tweaks to existing moves/abilities:
Intrepid Sword: every time this mon boosts its Attack or Sp. Attack, it receives an additional +1 in each boosted stat
Behemoth Blade (Crowned only): Z-Move from any Steel-type attack (with Steelium Z); 180 BP; damage is calculated using the higher offensive stat; boosts the higher offensive stat by one stage
How this makes it more interesting: With a sizeable nerf to its Speed and ability, this mon is a lot less immediately broken than in vanilla, making it a less braindead option in Ubers. What's more, it is slightly Physically weaker and frailer, but has greater Sp. Atk; this makes Zacian more of a challenge to use and gives it greater options by allowing it the option of going Special, thus making it more interesting. What's more, it still has the potential to wreak havoc, it only requiring a little bit of effort to set up. With the combination of Behemoth Blade and Intrepid Sword, Zacian has the ability to set up to +2 Atk/SpA while firing off a mighty powerful attack; a technique that only Kommo-o has. Overall, this makes the mon less innately broken, while more challenging to use and varied, with still great potential for a great attacking set with a powerful signature move.
Pokémon: Zamazenta
Typing: Fighting (base); Fighting/Steel (Crowned)
Stats (changes highlighted in bold):
Base: 92 / 130 /
105 (-
10) /
110 (+
30) /
105 (-
10) /
128 (-
10) (BST:
670)
Crowned: 92 / 130 /
135 (-
10) /
110 (+
30) /
135 (-
10) /
118 (-
10) (BST:
720)
Moves: Aura Sphere, Body Press, Dark Pulse, Shadow Ball, Calm Mind, Nasty Plot, Thunder/Thunderbolt, Roar,
Hyper Beam, Parting Shot
Tweaks to existing moves/abilities:
Intrepid Shield: every time this mon boosts its Defence or Sp. Def, it receives an additional +1 in each boosted stat
Behemoth Bash (Crowned only): Z-Move from any Steel-type attack (with Steelium Z); 180 BP; damage is calculated using the higher
defensive stat; boosts the higher defensive stat by one stage
How this makes it more interesting: Well, this thing was quite useless in Ubers - maybe now, it can pose both an offensive and a defensive threat? With access to the coveted Body Press (for which I nerfed its defences slightly), this thing can boost its defences and wreak havoc with not just Body Press, but a unique Z-Move that takes advantage of its defensive stats. With an ability that helps it boosts its stats earlier, this thing can tank hits and dish them out in return. To balance it out, however, it still lacks a way of boosting its SpD, and has no recovery (otherwise it would be truly ridiculous). What's more, besides its Z Move it struggles against Fighting resists, making sure it's not unkillable - however, this still makes it a potent threat, and much more appealing compared to its vanilla form.
Pokémon: Carnivine
Typing: Grass
Stats: 105 (+
31) /
110 (+
10) /
80 (
+8) / 90 /
80 (+
8) /
30 (-
16) (BST:
495)
Abilities:
Gluttony /
Stakeout /
Strong Jaw
Moves: Hyper Fang, Ice Fang, Thunder Fang, Psychic Fangs, Gunk Shot, Clamp, Pursuit, Sucker Punch, Strength Sap, Nasty Plot, Grassy Glide, Leech Life, Leaf Storm, Weather Ball, Solar Blade, Grassy Glide, Grassy Terrain, Toxic, Work Up,
Snap Trap
Tweaks to existing moves/abilities:
Snap Trap (only if the user is Carnivine): 60BP, 95% accurate; traps the target for 2-5 turns; Carnivine restores HP from damage dealt to the target ;
this mon takes resisted damage from Bug and Flying-type attacks; any mon that uses a contact move on Carnivine has a 10% chance to be *caught* in Snap Trap, which adds the Snap Trap effect without the move needing to be used
How this makes it more interesting: Well, what a ridiculous mon, a flytrap that takes double damage from Bug-type attacks. I think the best way to solve that conundrum, without giving it an extra typing which frankly I don't think fits, is to cheat, by giving Snap Trap a special unique effect that only works on Carnivine, giving it those juicy resistances. This also makes it a much more compelling mon to use as it can switch into mons more easily, and has a great array of irritating moves in Sleep Powder, Strength Sap, Toxic, Leech Seed, Clamp, and buffed Snap Trap to trap, disable and sap away at its opponents. Its move pool is greatly expanded, giving it an exciting range of options, from special attacker, to Grassy Terrain sweeper, to a utility mon with Defog and Sleep Powder. It also packs a decent punch, with better attack and great abilities in Stakeout and Strong Jaw, and has much better bulk, making it a great all rounder. But it's the unique effect of Snap Trap that makes it really stand out, as there is no move that acts as both Whirlpool and Leech Seed, giving Carnivine an interesting (and annoying niche).
NOTE: the idea of moves with unique effects for certain mons is not unprecedented in CFM, and there are a few examples:
Hypnosis: if the user is Drowzee or Hypno, this move never misses
Lick: (normally 30BP, matches user's type, 30% chance to paralyse or confuse its target)
if the user is Lickitung/Lickilicky, 100% chance to paralyse or confuse its target
Electroweb:
if the user is Joltik or Galvantula, this move becomes a 80BP/100% accurate single-target move with a 100% chance to paralyse the target
Psycho Boost: different effects depending on the forme of Deoxys using the move
/ 
\ 
and 
stitch
gamer guy