DB Multiverse

Why isn't Master Goku transforming to fight Yamoshi?

Even without transforming, my dad is an incredible fighter, and he's clearly much stronger than Yamoshi.

When we become Super Saiyans, we increase our base power.

That's why there's such a massive gap between his first Super Saiyan transformation against Frieza and his fight with Broly, for example.

Not all Super Saiyans are at the same level. Trunks and I are still far from my dad's and Vegeta's level, even in the same form.

You still seem to have pretty good reflexes for someone who doesn't want to fight anymore!