Ultimate Echo Echo first used them in Map of Infinity to battle some Necrofriggian colonists.
In Absolute Power: Part 2, Ultimate Echo Echo used the sonic disks to battle Ultimate Kevin. During the battle, it's revealed that the sonic disks can multiply and make a move called "Sonic Doom".
Sentient Ultimate Echo Echo used the sonic disks to distract Gwen (in Anodite form) inside the Ultimatrix in The Ultimate Sacrifice.
- In Greetings From Techadon, it's revealed that Ultimate Echo Echo's Sonic Disks can continue flying and attacking when Ben turns back to normal.