This is a list of mecha anime suggested by a listener, as mentioned on show #45, with some additions made in the forums:

Shin Getter Robo

Shin Getter vs Neo Getter

New Getter Robo

Mazinkaiser

Gear Fighter Dendoh

Giant Robo

Gundam Seed Destiny

G Gundam

GaoGaiGar

GaoGaiGar Final OVA

Godannar

FMP/FMP:2nd Raid (Full Metal Panic)

Daiku Maryuu Gaiking

GunBuster and DieBuster (GunBuster 2)

ZeoRymer

Macross Zero

Fafner

Zone of the Enders

Mazinger Z

Patlabor

Orguss 02

Voltron

Voltes V

Mazinger Z

Getter Robo

Getter Robo G

Gaiking

Combattler V

Mellowlink