Spider Web + Electroweb = Lowers speed 2 stages + 85 BP
Powder move + Fire move(Fire Cloud)= Target loses 25% of it's HP Illegal in Singles, since Vivillon can't learn WoW. Actually, the only Fire-type moves it can learn are Sunny Day and HP-Fire. Unless you really want to use Smeargle for this purpose. This applies to all powder moves, meaning Volcaron also gets the combo. I will change it to powder moves + fire type attack.
Bite + Elemental Fangs (Feral Fang)= 110 BP, 30% Flinch
Voice Move + Boomburst (Reverberate) = 180BP Does Boomburst really need more power? It is actually quite mild, seeing as you can do more damage with two turns of BB. Plus it takes up two move slots. P
Attract + Charm (Lover's Gaze)= minimize Attack if target is infatuated
Attract + Captivate (Lover's Beauty)= minimize Sp Attack if target is infatuated
King's Shield + Noble Roar = -4 Sp/attack I don't get why these are paired. King's Shield is also exclusive to Aegislash, who is banned. Paired due to the royal nature of both. Intended fof Smeargle as a useful cutting of opponent's offenses, similar to memento.
Spikes + Spiky Shield (Sword Barrier)= 1/8 Hp on contact Illegal anywhere, since Chesnaught cannot learn Sharpen and these are both self-target moves. Noted. Will change to spikes + Spiky Shield.
Spikes + Spike Cannon = BP x2, extra chance to crit See above. This combo also doesn't work very well since Sharpen involves reducing the user's polygon count. Fixed, similar to above.
Smokescreen + Smog/Clear Smog (Horrid Smoke)= 110 BP
Mud Sport + Mud Slap/Bomb/Shot = 120 BP + Guaranteed secondary effect Done in post 4 already.
Coil + Wrap/Bind (Bone Grip)= 1/8 HP per turn Bind usually involves an appendage like a tentacle or vine, so it probably shouldn't count. Coil can involve coiling appendages too.
Forest's Curse + Curse (Ghost)(Condemn)= Curse does 1/3 damage each turn
Sing/Song moves/Grass Whistle/Round + Petal/Fiery Dance (Frenetic Show)= 2x damage, secondary effects guaranteed Illegal in Singles, would only work in Doubles et. all if it ignores who Sing targets. Added more music related moves.
Sing/Grass whistle/Song moves/Round + Quiver dance/Feather Dance (Strange Show)= stat changes doubled Sing + Quiver Dance is illegal like above. Feather Dance doesn't seem to be much of a dance either. See above
Surf + Shock Wave/ Heat Wave/Sludge Wave = 100 BP, Guaranteed Paralyse/Burn/Badly Poison respectively. Wave refers to anything that oscillates. Only Sludge Wave counts here. Shock and Heat Wave are both waves, evident in the English names and Shock Waves Japanese name.
Bomb moves + Explosion/ Selfdestruct (Power Bomb)= BP 1.5x, explosion/Sd type is type of bomb move
Defense Curl + Physical Ball moves (Spin Dash Rev Roll Tuck and Roll)= BP x2.25 Should probably be modified to be only Physical moves. Defense Curl + Electro Ball doesn't make much sense. Noted.
Tailwind + Air cutter/Air Slash/Aeroblast/Gust/Hurricane = 130 BP Also done in post 4.
Tailwind + Ominous Wind/Silver Wind (Miracle Wind)= Guaranteed stat boosts
Feather Dance + Wing Attack/Steel Wing/Oblivion Wing (Wing Assault)= 120 BP
Gastro Acid+ Acid/Spray = 90 BP, lowers target's special defense 3 stages Acid Armor's name is a misleader. It's called Liquefy in Japan and has really nothing to do with acid. Adjusted.
Mist + Mist Ball (Mist Channel)= 120 BP, lowers target's offensive stats by 1
Slam + Body Slam (Piledriver)= Guaranteed Paralysis, 120 BP
Aromatherapy + Smelling Salts (Smell Assaults)= 300 BP, only works on targets with status conditions. Heals status.
Teeter Dance + Dizzy Punch (Topple Strike)= 130 BP
Baby Doll Eyes + Lovely/Sweet Kiss (Puppy Love)= +1 Priority, 100 Acc Kind of similar to Seduce (Charm + Sweet Kiss) that I had earlier, but oh well.
Just a couple of ideas :)