dragon
117 Pokemon have the Dragon type in PokeAPI (including alternate forms); the first 60 are shown below.
Dragon moves are super effective against Dragon; not very effective against Steel; and have no effect on Fairy. See the full type matchup chart.
dratini
dragonair
dragonite
kingdra
vibrava
flygon
altaria
bagon
shelgon
salamence
latias
latios
rayquaza
gible
gabite
garchomp
dialga
palkia
giratina-altered
axew
fraxure
haxorus
druddigon
deino
zweilous
hydreigon
reshiram
zekrom
kyurem
dragalge
tyrunt
tyrantrum
goomy
sliggoo
goodra
noibat
noivern
zygarde-50
turtonator
drampa
jangmo-o
hakamo-o
kommo-o
guzzlord
naganadel
applin
flapple
appletun
dracozolt
dracovish
duraludon
dreepy
drakloak
dragapult
eternatus
regidrago
cyclizar
tatsugiri-curly
frigibax
arctibax