Chemistry

Chemistry is a new feature in the Mario sports titles that so far is exclusive to Mario Superstar Baseball. It extensively sparks the relationships between the different characters in the Marioverse and puts them to good use. Unfortunately, a majority of the critisism towards the game was due to the terrible making of the Chemistry system. Many characters lacked chemistry with supposed characters, and on the other hand some characters had unexpected buddies. Below is a list of the characters who are buddies with who and who should've been buddies with who as speculated by the fans (not all characters have speculated buddies):

Mario

 * Luigi
 * Peach
 * Yoshi

Speculated Buddies:
 * Daisy
 * Toad
 * Toadsworth
 * Baby Mario
 * Baby Luigi
 * Noki
 * Pianta

Luigi

 * Mario
 * Peach
 * Daisy

Speculated Buddies:
 * Toad
 * Baby Mario
 * Baby Luigi

Peach

 * Mario
 * Luigi
 * Daisy
 * Toad
 * Toadette
 * Toadsworth

Speculated Buddies:
 * Baby Mario
 * Baby Luigi

Daisy

 * Peach
 * Luigi

Speculated Buddies:
 * Mario
 * Toad
 * Toadette
 * Baby Mario
 * Baby Luigi

Yoshi

 * Mario
 * Birdo
 * Baby Mario
 * Baby Luigi

Speculated Buddies:
 * Toadette

Birdo

 * Yoshi
 * Shy Guy
 * Petey Piranha

Wario

 * Waluigi
 * Boo

Speculated Buddies: King Boo Magikoopa

Waluigi

 * Wario
 * Magikoopa

Speculated Buddies:
 * King Boo
 * Boo

Donkey Kong

 * Diddy Kong
 * Dixie Kong
 * Petey Piranha

Diddy Kong

 * Donkey Kong
 * Dixie Kong
 * Goomba

Speculated Buddies:
 * Paragoomba

Bowser

 * Bowser Jr.
 * Hammer Bro.
 * Dry Bones
 * Koopa Troopa
 * Paratroopa

Speculated Buddies:
 * Boo
 * King Boo
 * Magikoopa
 * Goomba
 * Paragoomba

Bowser Jr.

 * Bowser
 * Hammer Bro.
 * Magikoopa

Speculated Buddies:
 * Boo
 * Dry Bones

Toad

 * Peach
 * Toadette
 * Toadsworth

Speculated Buddies:
 * Mario
 * Luigi
 * Daisy
 * Other Toads

Toadette

 * Toad
 * Toadsworth
 * Peach

Speculated Buddies:
 * Daisy
 * Yoshi

Toadsworth

 * Peach
 * Toad
 * Toadsworth

Speculated Buddies:
 * Mario

Goomba

 * Diddy Kong
 * Paragoomba
 * Monty Mole

Spectulated Buddies:
 * Bowser

Paragoomba

 * Goomba
 * Monty Mole
 * Paratroopa

Speculated Buddies:
 * Bowser
 * Diddy Kong

Dixie Kong

 * Donkey Kong
 * Diddy Kong

Baby Mario

 * Yoshi
 * Baby Luigi

Speculated Buddies: Mario Luigi Peach Daisy

Baby Luigi

 * Yoshi
 * Baby Mario

Speculated Buddies:
 * Mario
 * Luigi
 * Peach
 * Daisy

Boo

 * King Boo
 * Wario

Speculated Buddies:
 * Waluigi
 * Bowser
 * Dry Bones
 * Petey Piranha

King Boo

 * Boo
 * Petey Piranha

Speculated Buddies:
 * Wario
 * Waluigi
 * Bowser

Dry Bones

 * Bowser
 * Koopa Troopa

Speculated Buddies:
 * Bowser Jr.
 * Hammer Bro.
 * Boo
 * Paratroopa
 * Other Dry Bones'

Koopa Troopa

 * Paratroopa
 * Bowser
 * Dry Bones

Speculated Buddies:
 * Hammer Bro.
 * Magikoopa
 * Other Koopa Troopas

Paratroopa

 * Koopa Troopa
 * Bowser
 * Paragoomba

Speculated Buddies:
 * Dry Bones
 * Other Paratroopas

Hammer Bro.

 * Bowser
 * Bowser Jr.

Speculated Buddies:
 * Dry Bones
 * Fire Bro.
 * Boomerang Bro.

Magikoopa

 * Boo
 * Waluigi
 * Bowser Jr.

Speculated Buddies:
 * Bowser
 * Other Magikoopas

Petey Piranha

 * King Boo
 * Donkey Kong
 * Birdo

Speculated Buddies:
 * Boo

Monty Mole

 * Goomba
 * Paragoomba
 * Shy Guy

Pianta

 * Noki

Speculated Buddies:
 * Mario
 * Other Nokis

Noki

 * Pianta

Speculated Buddies:
 * Mario
 * Other Nokis