Mold Breaker, Teravolt, and Turboblaze don't negate Slow Start, unfortunatley, only these moves:
Battle Armor
Big Pecks
Clear Body
Contrary
Damp
Dry Skin
Filter
Flash Fire
Flower Gift
Friend Guard
Heatproof
Heavy Metal
Hyper Cutter
Immunity
Inner Focus
Insomnia
Keen Eye
Leaf Guard
Levitate
Light Metal
Lightningrod
Limber
Magic Bounce
Magma Armor
Marvel Scale
Motor Drive
Multiscale
Oblivious
Own Tempo
Sand Veil
Sap Sipper
Shell Armor
Shield Dust
Simple
Snow Cloak
Solid Rock
Soundproof
Sticky Hold
Storm Drain
Sturdy
Suction Cups
Tangled Feet
Telepathy
Thick Fat
Unaware
Vital Spirit
Volt Absorb
Water Absorb
Water Veil
White Smoke
Wonder Guard
Wonder Skin