Sceptile Would Be Cool In Crusade Because It's A Unique Pokemon. It Has A Tail That Can Be Used As A Missle When Mega Evolved, And That Could Be A Way To Make A Final Smash For It. It Is Said In The Pokedex Of Pokemon Ruby That It Is Very Agile And Can Jump From Tree To Tree Very Easily. That Could Be Used So We Could Have A Big Character That Moves Quickly. It Is Also A Very Iconic Pokemon For Gen 3. It Has Been A Part Of Pokemon Since Gen 3.
Normal Attacks:
Neutral Attack: Short Leaf Blade Slice. Sceptile Is Pertly Known For It's Leaf Blades On It's Arms, So It Would Make Sense To Add More Leaf Blade Attacks
Combo Attack: Leaf Blade Repeatedly.
Side Tilt: Leaf Blade But With More Range
Up Tilt: Swings The Leaf Blade Above It's Head.
Down Tilt: Tail Swipe. Sceptile Swipes It's Tail On The Ground In The Direction It's Facing
Dash Attack: Cut. Slices A Quick Strong Attack While It's Running
Aerial Attacks:
Neutral Aerial: Tail Spin. It Spins In A Circle With It's Tail Out.
Side Aerial: Tail Swipe. Basically The Same Thing As The Down Tilt.
Up Aerial: Leaf Blade. Slices Above It's Head With Leaf Blade
Down Aerial: Tail Jab. Jabs It's Tail Downwards And Kind Of Ground Pounds, Like Toon Link's Down Aerial.
Grab/Throws:
Grab: Just A Normal Grab
Pummel: Headbutt
Up Throw: Holds The Opponent Above It's Head And Leaf Blades Upwards.
Forwards Throw: Just Throws The Opponent Forward
Backwards Throw: Spins Around And Throws The Opponent
Down Throw: Puts The Opponent On The Ground, Uses Leaf Blade Three Times And Then Slams It's Tail On The Opponent
Get Up Attacks:
Get Up Attack: Tail Swipe. Like The Down Tilt, But Does A Full Circle
Ledge Attack: Tail Swipe. Literally The Down Tilt.
Specials:
Neutral Special: It Grows A Tree It Can Chop Down. I Say This Because In The Pokedex Entry Of Pokemon Sapphire It Says The Seeds On It's Back Can Revitalize Trees.
Side Special: Leaf Blade Charge. It Has The Leaves Growing On It's Arms, Witch Are Said To Be Very Strong.
Up Special: Agility. Since It's Known For Being Agile, Agility Would Be A Good Move. It Could Move Upward Agilely, And You Could Go Left Or Right Diagonally.
Down Special: Protect. It Could Act Similarly To Ness' Down Special.
Smash Attacks:
Side Smash: Fury Cutter. It Could Use Its Arm Leaves To Slice Repeatedly To One Side.
Up Smash: Leaf Storm. It Could Be Like A Small Tornado Of Leaves That Sceptile Holds Above It's Head.
Down Smash: Rock Smash. Places A Rock Underneath It And Then, Well, Smashes It.
Final Smash:
Mega Sceptile. It Could Use The Fact That Mega Sceptile's Tail Can Be Shot Off Like A Missle, So It Could Be Similar To Gooey's Final Smash.
Taunt: Sword Dance. I Don't Know What Else To Say.