>dugtrio-a
frail and low attack
>magnezone
extremely good line
>forretress
no steel type moves worth using
>steelix
needs trading
>scizor
needs trading
>skarmory
low attack, mediocre speed, low special defense
>mawile
weak without mega, especially in gen 3
>aggron
steel / rock
>metagross
impossible to get in most games, super late game when it is
>empoleon
extremely good line
>bastiodon
shit
>bronzong
good line
>lucario
gen 4: requires a ton of training
gen 6: game breaking
>probopass
shit and requires magnetic field
>excadrill
game breaking
>escavalier
needs trade
>ferrothorn
pain to train
>klinklang
no moves
>bisharp
late game
>durant
literally on victory road
>aegislash
extremely good line
>klefki
decent mon
>togedemaru
decent mon