Mario and Luigi: Sonic Boom

Mario and Luigi: Sonic Boom is a game with crossover of Sonic The Hedgehog. in this plot Mario, Luigi and Sonic trying to stop Dr Eggman and Bowser in Mushroom Kingdom. this is the third and final game release to 3DS and the sixth in the series. it was released in 2019 and development by Alphadream and published by Nintendo.

Special Attacks:
Mario:
 * Red Shell
 * Fire Flower
 * Trampoline
 * Rollerskate Attack
 * Mega Hammer

Luigi:
 * Green Shell
 * Ice Flower
 * Chomp Chase
 * Mega Thwonk
 * Star Meteor

Sonic:
 * Homing Charge
 * Power Shoes
 * Ring Recover
 * Chaos Control ( With Shadow)
 * Super Sonic ( With 7 Chaos Emerld)

Characters:
Playable:
 * Mario
 * Luigi
 * Sonic The Hedgehog

Supporting:

Mario:
 * Princess Peach
 * Toads
 * Starlow
 * Toadsworth
 * Toadette
 * Professor E.gadd

Sonic:
 * Tails
 * Knuckles
 * Amy Rose
 * Blaze
 * Shadow
 * Cream

Antagonist:
 * Bowser
 * Dr. Eggman
 * Kamek
 * Scratch
 * Grounder
 * Coconut
 * Bowser Jr.
 * Zavok
 * Zazz
 * Zeena
 * Master Zik
 * Zomom
 * Zor
 * Larry
 * Ludwig
 * Morton
 * Roy
 * Lemmy
 * Wendy
 * Iggy
 * Mecha Sonic

Enemies:

Mario:
 * Goomba
 * Koopa Troopa
 * ParaTroopa
 * Paragoomba
 * Cheep Cheep
 * Big Goomba
 * Boo
 * Big Boos
 * Dry Bones
 * Shy Guys
 * Hammer Bro
 * Boomerang Bro
 * Fire Bro
 * Ice Bro
 * Sledge Bro
 * Ninji
 * BiddyBud
 * Urchin
 * Dino Rhino
 * Lakitu
 * Spiny
 * Buzzy Beetle
 * Bob-Omb
 * Fire Piranha Plant
 * Ptooie
 * Rex
 * Fighter Fly
 * Side Stepper
 * Broozer
 * Chain Chomp

Sonic:
 * EggRobo
 * Motobug
 * Crabmeat
 * Buzz Bomber
 * Buzzer
 * Rhinobot
 * Bee Bot
 * Crab Bot
 * Chopper
 * Caterkiller
 * Jaws
 * Eggpawn
 * Bladed Spinner
 * Bat Brain
 * Burrobot
 * Nebula
 * Grabber
 * Boom Boo
 * Sand Worm
 * Egg Fighter
 * Swordsman Trooper
 * Blaster Guards
 * Roller Bouncer
 * Needlenose
 * Mecha Bu

Mecha Battle Bosses:

 * Mecha Egg Robot
 * Mecha Scratch and Mecha Grounder
 * Mecha Bowser Jr.
 * Mecha Deadly Six
 * Mecha Koopalings
 * Mecha Bowser Eggman

Items:
Mario:
 * Coins
 * Beans
 * Mushroom
 * Candy
 * Syrup
 * 1-Up Mushroom

Sonic:
 * Rings
 * Shields
 * Chaos Power
 * Chili Dog

Locations:

 * Peach Castle
 * Mushroom Kingdom
 * Dry of Desert
 * Tropic Beach
 * Underground Cave
 * Lost Forest
 * Cold Cold Mountain
 * Dr. Eggman/ Bowser Base/Castle

Pre-release and unused content:

 * Tails, Knuckles or Shadow was planned to be playable characters, but just like Paper Jam, in would be difficult with 4 button press and was scrapped.
 * Sonic characters like Sally, Antione, Bunnie, Rotor, Snivley and Stick was also planned to appear in the game, but was scrapped in development, However Sonic mentions them as Freedom Fighters in some parts.

Trivia:

 * This is Second Mario and Luigi Series to have Crossover, the first is Paper Jam.
 * This is also first time appearence for Scratch, Grounder and Coconut since Robotnik Mean Bean Machine.
 * Sonic Characters talking in Speech bubbles instead for sound.
 * However they saying some words like for example Sonic saying hey, and Chili Dog.
 * This is not the first time Mario and Sonic meet each other, they also meet in Mario and Sonic Olympic Games series and Super Smash Bros Series.