Alright, I've been talking to people, and many of them have had misconceptions over what power stage = what, so I'm going to lay this all out in a pretty table.
Characters begin at Stage 1 in one of the four basic races with 200 Reiatsu. Upon achieving 500 Reiatsu, they can quest for their second stage, and upon achieving 1,000 Reiatsu, they can quest for their third.
Every power stage is equal to every other one in the same stage slot, as demonstrated below.
Shinigami/Vizard progressions
| Stage 1 | Stage 2 | Stage 3 |
| Shinigami: | Shikai | Bankai | Zenkai |
| Mask: | Shikai | Bankai | Vizard Mask |
| Resurreccion: | Shikai | Vizard Mask | Resurreccion |
Menos/Arrancar Progressions
| Stage 1 | Stage 2 | Stage 3 |
| Menos: | Gruñido | Adjuchas | Vasto Lorde |
| Resurreccion: | Gruñido | Adjuchas | Resurreccion |
| Segunda: | Gruñido | Resurreccion | Segunda Etapa |
Quincy/Ascended Quincy Progressions
| Stage 1 | Stage 2 | Stage 3 |
| Quincy: | Quickening | Sanrei | Letzt Stil |
| Shinigami Quincy: | Quickening | Shikai | Bankai |
| Menos Quincy (extra rare): | Quickening | Gruñido | Adjuchas |
Spiritualists/Ascended Spirtualist Progressions
| Stage 1 | Stage 2 | Stage 3 |
| Spiritualist: | First Stage | Second Stage | Third Stage |
| Shinigami Spiritualist: | First Stage | Shikai | Bankai |
| Menos Spiritualist: | First Stage | Gruñido | Adjuchas |