If you were looking for the glitch move, see TM20 (move).

TMs vary between generations. TM20 is:

This TM was not available before Generation IV
Generation I
Bag TM Normal Sprite.png Rage
Location Purchase price Sell price
RBY Route 15 N/A PokémonDollar.png1000
Generation II
Bag TM Normal Sprite.png Endure
Location Purchase price Sell price
GSC Burned Tower N/A PokémonDollar.png1500
Generation III
Bag TM Normal Sprite.png Safeguard
Location Purchase price Sell price
RSE Lilycove Department Store PokémonDollar.png3000 PokémonDollar.png1500
FRLG Celadon Department Store N/A PokémonDollar.png1500
Colo. The Under Shop PokémonDollar.png3000 PokémonDollar.png1500
XD Realgam Tower PokémonDollar.png3000 PokémonDollar.png1500
MDRB Great Canyon N/A N/A
Generation IV
Bag TM Normal Sprite.png Safeguard
Location Purchase price Sell price
DPPt Veilstone Department Store PokémonDollar.png2000 PokémonDollar.png1000
HGSS Celadon Department Store PokémonDollar.png2000 PokémonDollar.png1000
PBR* Currently Unknown N/A N/A
MDTDS Currently Unknown 6500 Poké N/A
MDBSL Currently Unknown N/A N/A
Generation V
Bag TM Normal Sprite.png Safeguard
Location Purchase price
BW Nimbasa City PokémonDollar.png30000
B2W2 Battle Subway, Pokémon World Tournament 6BP
Location Purchase price Sell price
MDGtI Currently Unknown N/A N/A
Generation VI
Bag TM Normal VI Sprite.png Safeguard
Location Purchase price
XY Shalour City Poké Mart PokémonDollar.png30,000
ORAS Lilycove Department Store PokémonDollar.png10,000
Location Purchase price Sell price
SMD Kecleon Shops 1432 Poké currency.png 144 Poké currency.png
Generation VII
Bag TM Normal VI Sprite.png Safeguard
Location Purchase price
SM Heahea City PokémonDollar.png10,000


TM19
Technical Machines
TM21
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