---
# nuzlocke-tracker-o18w
title: Add region field to evolutions
status: completed
type: feature
priority: normal
created_at: 2026-02-07T18:55:07Z
updated_at: 2026-02-07T18:57:25Z
---

Add nullable region field to evolutions for regional form evolution filtering (e.g., Pikachu → Alolan Raichu only in Alola). Full-stack: DB migration, model, schemas, API, seeder, Go tool, frontend types/API/hook/components.