Complete seasons of Sonic Boom in Spanish (both Latin American and Castilian dubs) can be found on the Internet Archive (archive.org)
Descarga "Sonic Boom" capítulos completos en español desde Internet Archive
If you are looking for specific dubbed episodes that might be missing from an archive:
As the iconic theme music kicked in, Spanish voice actors bringing Eggman’s dramatic flair to life, Leo felt a rush of nostalgia. The Archive hadn't just saved a show; it had preserved a piece of his history, tucked away in a corner of the web where the blue blur could run forever.
: Use terms like "Sonic Boom Español Latino" or "Sonic Boom Serie Completa" directly in the Internet Archive Search Bar Download Options
of all 104 episodes so you don't miss any.