The End gets Pokémon: a dimension zone with Cobblemon's End lines

Adrian, 2026-11-02: the End looked barren. The End is now a zone of its own
(Lv 50-70, world/zones.json -> dimensions; Zones.at returns it anywhere in the
End). tools/zone_spawns.py copies every line Cobblemon spawns in End biomes
into spawn_pool_world/the_end.json, on top of its island home: Beheeyem,
Reuniclus, Metagross; Gothitelle and Sigilyph in End cities; Malamar and
Unown with a Poke Snack. Cobblemon rolls the bucket before the Pokemon and
has these all uncommon or rare, so they move to the common bucket with even
line weights (Metagross a fifth).

Self-test end_has_spawns: the main island is in the_end and offers only End
spawns, some in the common bucket. Self-tests and the island check pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/checklists/phase-7.md

@@ -10,6 +10,7 @@
 - **Boss fights:** a battle with a guardian (or the End boss) becomes a fight with area attacks: red or coloured particles on the ground show where an attack lands, about 1.5–2.5 seconds later it hits whoever stands inside. Circles, lines, cones and rings; harder zones get more of them. Fire, Ice and Poison bosses burn, freeze or poison. Automated: `boss_attack_shapes`, `boss_attacks_land_and_stop_with_the_battle`.
 - **Arena:** leaving it (24 blocks; Basalt 32; End 40) or dying ends the battle as lost; the boss heals and stays. Automated: `boss_arena_leaving_loses`.
 - **The End:** the Ender Dragon is gone; Eternatus appears on the main island, with the dragon's boss bar; beating it opens the exit portal and gateway, leaves the egg the first time and gives experience. Automated: `end_boss_replaces_the_dragon`.
+- **End spawns:** the End is a zone (Lv 50–70) with Cobblemon's End lines: Beheeyem, Reuniclus, Metagross; Gothitelle and Sigilyph in End cities; Malamar and Unown with a Poké Snack. Automated: `end_has_spawns`.
 
 ## In game (Prism instance)
 
@@ -21,6 +22,7 @@ On the island save (or a new one), in creative or survival:
 - [ ] Leave the End and come back without beating Eternatus: still only one (fixed 2026-11-02).
 - [ ] Go to the End: no dragon; Eternatus stands south of the portal, the boss bar shows its HP. Beat it: the exit portal opens, the egg appears.
 - [ ] Find Regigigas in a Deep Dark cave and Moltres in the Basalt Furnace.
+- [ ] Walk around the End's islands for a minute: Beheeyem, Reuniclus and now and then Metagross appear, Lv 50–70 (`/cobblesurvival zone` shows "The End").
 
 ## Ask Adrian