Pokemon: Cacturne
Typing: Grass/Rock
Abilities: Iron Barbs/Water Absorb
Stats: HP 88 / Atk 92 / Def 84 / SpA 93 / SpD 91 / Spe 32 / BST 490
Movepool Additions: Dust Devil, Stone Edge, Rock Blast, Rock Throw, Smack Down, Rock Polish
Movepool Removals: Dark Pulse, Switcheroo, Embargo, Feint Attack,
Reasoning: Ok, so, I'll start off with my choice of pokemon- first of all Cacturne is well, a cactus, so that's one, two is that with most of my submissions so far I've chosen Pokemon in lower tiers (being NatDex RU in the case of Cacturne, which is literally the only non-NFE/LC tier of NatDex, so yeah) and that need a buff, furthermore it better conveys the idea of this Pokemon being in a desert and all, also the type change is so it actually gets STAB on Dust Devil and said typing is complemented by its ability in Water Absorb (not like Grass already cancels out Rock's weakness to Water, but that's beside the point), and furthermore I can justify the replacement of Sand Veil with this new typing as iron is a mineral, which I think is found in rock, I mean I'm no expert, so I could've maybe be somehow fooled this whole time... but again that's beside the point, the point is that I'm giving Cacturne an ability which fits it's, well, pointy features which I can now further justify with it's new typing of Grass/Rock, and that's about it.
Pokemon: Carbink
Typing: Rock/Fairy
Abilities: Clear Body/Sturdy/Crystallize
Stats: HP 50 / Atk 70 / Def 130 / SpA 70 / SpD 130 / Spe 50 / BST 500
Movepool Additions: Bulk Up, Body Slam
Movepool Removals: None
Reasoning: Explosion + Crystallize, nuff said, would be absolutely amazing to watch it just rip apart the bulkiest of 'mons- that aside I think it also just works cause Carbink has literal gems 'n all inside of it, so it kinda makes sense it would have the ability called "Crystallize" lol, that and it already has Calm Mind and with the addition of Bulk Up and rearranging of some stat points it can pretty well (at least from what I would imagine) as a setup sweeper for both physical and special sets, though it doesn't have that great of a Special Normal-type move, and I don't think most would fit it, and I could argue that Boomburst fits it, but that feels a bit too powerful, of course it can all very well just fall flat when facing against a Steel-type since both of its STABs hit it for ineffective damage, and of course it has a 4x weakness to Steel, so I think that somewhat balances it out (though it does have Body Press, so Steel types may not be as big of a problem for it, but still).
Pokemon: Magcargo, Signature Item: Molten Rock
Typing: Rock/Fire
Abilities: Magma Armor/Flame Body/Solid Rock
Stats: HP 75 / Atk 45 / Def 120 / SpA 100 / SpD 110 / Spe 30 / BST 480
Movepool Additions: Meteor Beam, Body Press
Movepool Removals: None
Reasoning: I don't have much of a reason admittedly aside from the fact Magcargo needs a buff, as with most of the mons I've picked, but it also fits because it's the Lava Pokemon, and I think the Molten Rock item just really fits Magcargo, this is relatively simple and short reasoning, but I think it makes sense.