Please note that after both Meditation and Solar Kick Yoshi enters BT stance: all directional commands are considered as if Yoshi was still in Normal stance. The directional commands like b~u/b~u~U/F must be done in a quick, smooth motion... every direction cancells other, that's why they must be done in a flash. Basically: "b" cancells Meditation, and all other directions are used as a shift to a certain command. I listed here my techniques, I bet there are more interesting cancells. :D

TEKKEN 3/TAG Meditation Starter: SS+3+4

Classic extensions:

Meditation Healing: ~F
Soul Siphon Throw: 1+4
Possession Throw: F+1+4
End Meditation: ~b [ only! ]

Unconventional buffered extensions:

Meditation BT Recovery: SS+3+4~b~u/b~u~u/f
Meditation Backfist: SS+3+4~b+2,
Meditation High Jab: SS+3+4~b+1
Meditation Low Jab: SS+3+4~b~d/b~d+1_or_d+2
Meditation Low Kick: SS+3+4~b~d/b~d+4_or_d+3
Meditation BK Kick: SS+3+4~b+3 or SS+3+4~b+4
Meditation Hopkick :
version 1. => Hop back SS+3+4~b~U/B+4
version 2. => straight Hopkick SS+3+4~b~u/b~U+4
version 3. => advance Hopkick: SS+3+4~b~u/b~u~U/F+4
Meditation Throw: SS+3+4, b+2+4

Meditation Manji Spin Slaps backwards: SS+3+4~b~D/B+2,2,2... !!! cool!

Meditation Jumping Stun Kick: SS+3+4~b~u/b~u~U/F, N+3
Meditation Jumping Low Kick: SS+3+4~b~u/b~u~U/F, N, d+3
Meditation Jumping Hopkick: SS+3+4~b~u/b~u~U/F+4
Meditation Jumping Hopkick While landing: SS+3+4~b~u/b~u~U/F, N+4
... and all jumping stuff like U/F+1, U/F+2... etc.

TEKKEN 4 Meditation Starter: SS+3+4 or 3+4

Classic extensions:

Meditation Healing: 1+2
Soul Siphon Throw: 2+3
Possession Throw: QCB, F+2
End Meditation: B or F or U or D
Meditation turn around: b~3+4

Meditation Backflip: 3+4
Meditation Suicide: 1+4
= Manji Blood dance: B+1,1,1,1,1

Unconventional buffered extensions:

Meditation BT Recovery: 3+4~f~u/f~u~u/b
Meditation Backfist: 3+4~f+2,
Meditation High Jab: 3+4~f+1
Meditation Low Jab: 3+4~f~d/f~d+1_or_d+2
Meditation Low Kick: 3+4~f~d/f~d+4_or_d+3
Meditation BK Kick: 3+4~f+3 or SS+3+4~f+4
Meditation Hopkick : 3+4~f~U/F+4
Meditation Throw: 3+4, 2+4

Meditation Jumping Stun Kick: 3+4~f~U/F, N+3
Meditation Jumping Low Kick: 3+4~f~U/F, N, d+3
Meditation Jumping Hopkick: 3+4~f~U/F+4
Meditation Jumping Hopkick While landing: 3+4~f~U/F, N+4
... and all jumping stuff like U/F+1, U/F+2... etc.

Meditation Flea: 3+4, f~1+2 [ This one is cool! ]
Meditation Sit 3+4, f~d/f~d+3+4
Meditation Sword Slash: 3+4, D/B+1

Meditation turn around to Meditation: 3+4, b~3+4
=> Meditation Forward to Samurai Knee: 3+4, b~3+4, f~u/f+3
=> Meditation Forward to Avoiding the Puddle: 3+4, b~3+4, f~u/f+4
=> Meditation Forward to Deathcopter: 3+4, b~3+4, f~u/f+1+2
===> Meditation Forward to Deathcopter Slash: 3+4, b~3+4, f~u/f+1+2~D
===> Meditation Forward to Deathcopter Trick: 3+4, b~3+4, f~u/f+1+2~B
=> Meditation Forward to Jumping Hopkick: 3+4, b~3+4, f~U/F+4
=> Meditation Forward to Stun Kick: 3+4, b~3+4, f~U/F, N+3
=> Meditation Forward to Low Kick: 3+4, b~3+4, f~U/F,N,d+3
=> ... and all jumping stuff...

Solar Kick extensions: f,F+1+2

=> all BK things works, like jabs, kicks, jumpkicks...

Solar Kick Soul Siphon: f,F+1+2~1+4
Solar Kick Possession: f,F+1+2~F+1+4
Solar Kick Evasive Sidespin: f,F+1+2~3+4,3+4... [ probably the most safe and useful ]
Solar Kick Manji Spin Slaps backwards: f,F+1+2~D/B+2,2,2,2
Solar Kick Deathcopter: f,F+1+2~U/B+1+2
=> Deathcopter Slash: ~D
=> Deathcopter Trick: ~F

Solar Kick Flea: f,F+1+2~1+2 [ and all extensions afterwards!!! ] [ Tekken 4 only ]

Solar Kick Sit f,F+1+2~d+3+4 [ and all extensions afterwards!!! ] [ Tekken Tag and 4 only ]

Solar Kick Sword Impale: f,F+1+2~1+4
Solar Kick Sword Spin: f,F+1+2~1+4,1
Solar Kick Sword Spin~Cancel: f,F+1+2~1+4,1~b,b
Solar Kick Ochimusha Hunter: f,F+1+2~1+4,1+2 [ Tekken 4 only ]
Solar Kick Sword Slash: f,F+1+2~D/B+1
Solar Kick Moonsault Slayer f,F+1+2~QCF+1