Burner Shelly is hot to the touch (she is practically a furnace)

Burner Shelly has a bit of a unique pallet since she doesn't have a direct D.W counterpart (the most accurate one is Shelly)

Burner Shelly has she/them/it pronouns

Burner Shelly is based off Metal Sonic (of course) and Furnace from the Starved Eggman Sonic CD AU (it technically is one)

the coldest parts of Burner Shelly are her fingertips and feet.

Burner Shelly lessens her heat generator that keeps her going when Teevee is near (she doesn't want to accidentally kill her master.)

Burner Shelly refers to Teevee by her USA name in that AU which is 'Vee Version 1' which is actually D.W Vee's full name

Burner Shelly refers to the Shelly in the timeline she is in as 'The Sourly Sweet Cinnamon' which is a parallel to Metal Sonic referring to Sonic as 'My loathsome copy' and a reference to Shelly being mistake for a Cinnamon Roll.

Burner Shelly has a flame thruster that stems from her backside region (no I'm not kidding it is actually there.)

I fought her and it was rough shortly after taking the pic (ouch)