Blowtron

Blowtron is  a  tuba-themed  Robotron created  by  Robo-Blaze  from  a  tuba   and the main villain  Blowtron  appeared   in  the  SML  Short  Bowser Jr.'s  Tuba  where  Bowser  Jr.  tries  to take care  of  his  tuba but   it  got  taken  by  Robo-Blaze  and  used  the  Robotron-Maker  and  he  infected  Bowser  Jr's  tuba  to create Blowtron but  he  got  attacked  by  Devon  Daniels  Ravi  Shaw  Zoey Reeves  Nate  and  Steel  along with  Freddy the Flamingo  and  they destroyed Blowtron  for  good