Direct answer: The rare NPCs in Roblox Rivals (including secret boss spawns like Nosniy and special event NPCs such as the Shady Chicken that gives Mega Token missions) most commonly appear after completing specific hidden steps in the lobby area (especially the firing range), during limited-time events, or as rewards for multi-step token quests across other games.

Where they spawn

  • Firing range / lobby hidden room — several secret NPCs and the Nosniy boss are unlocked by shooting special X-shaped or angled targets in the firing range; finding and shooting the differently angled targets opens a hidden door where the NPC/boss appears.
  • Event locations and rotating maps — event-only rare NPCs and cosmetic-drop NPCs spawn during limited-time events or seasonal map rotations, so check event announcements and login during event windows.
  • Quest/NPC hubs (Shady Chicken) — some NPCs only offer missions after you’ve completed prerequisites (for example, collecting Mega Tokens from other Roblox games in a specific order), then appear in the lobby NPC hub to give the special mission that leads to boss fights or rare rewards.

How to trigger their appearance

  • Complete external prerequisites — certain Mega Token chains require collecting tokens in other Roblox games in an exact order before the Rivals NPC will interact with you; skip one and the NPC ignores you.
  • Shoot the special targets — find and shoot all X-shaped/angled targets in the firing range; once all are hit a door opens to the secret room where the NPC/boss spawns.
  • Finish mission objectives — many rare NPC encounters require completing a sequence (for example: kill-counts in 3v3 to collect Golden Scrolls, then face Nosniy) to progress and finally claim the rare item.

Best tactics when hunting rare NPCs

  • Farm the firing range systematically — walk a consistent path and mark which targets you’ve shot to avoid repeats; focused searching reduces time.
  • Play during events and double-drop times — event windows increase your chance of encountering event-only NPCs or getting rare drops.
  • Bring cover and counters for bosses — Nosniy cycles through sniper, turret, and Molotov phases; use cover, peek-and-shoot for sniper phases, stay behind cover for turret barrages, and dodge/retaliate against Molotov attacks as advised in boss guides.

Quick step-by-step example (to get Hunt Mega Token / Nosniy boss)

  1. Collect required Mega Tokens in the exact order from the four linked Roblox games (SpongeBob TD, Unlimited Tag, Pressure, Chained 2 Player Obby).
  1. Enter Rivals, go to the firing range, and shoot all X-shaped/angled targets until the hidden room opens.
  1. Enter the room and talk to the Shady Chicken NPC to receive the Special Mission (e.g., eliminate 15 players in 3v3 and collect Golden Scrolls).
  1. After mission progress, select and fight the Nosniy boss using the recommended defensive and offensive tactics. Return to the NPC to claim the Hunt Mega Token when done.

Useful resources

  • Gameplay/guide videos that demonstrate target locations and boss fights provide helpful visual walkthroughs. Examples include channel guides showing firing-range target patterns and the secret boss room opening.
  • Written step guides explain token prerequisites and exact mission steps for Mega Tokens and rare rewards.

Bottom note: Information gathered from public forums, guide sites, and gameplay videos available on the internet and portrayed here.

Would you like a short visual route (step list) you can follow in-game for the firing range targets and the lobby hideout?