Scootaloo + Rumble = Lightening (far left) and Thunder (far right)
Sweetie Belle + Button Mash = Pixel music (middle left)
Apple Bloom + Tender Taps = Apple Jazz (middle right)

Full Picture:
https://www.deviantart.com/princessmoonstaryt/art/MLP-Next-Gen-CMC-802800038

Bases:
https://www.deviantart.com/raini-bases/art/MLP-Base-2-488769112

Music:
https://www.youtube.com/watch?v=zZAO0qf9bWo
https://www.youtube.com/watch?v=rR_TOiJa5Yw
https://www.youtube.com/watch?v=ZVqlcNgaow4

What I use to Paint:
MS Paint and Medibang

What I use to record:
Free Cam 8

What I use to edit video:
VideoPad Video Editor