---
title: "SpongeBob Baby Plankton Keychain — Roblox UGC Limited"
description: "SpongeBob Baby Plankton Keychain is a Roblox UGC Limited (Waist Accessory) by Square Sponge. RAP 316 R$."
url: "https://rbxinvest.com/item/108486455041245"
type: "roblox-limited-item"
asset_id: "108486455041245"
item_type: "ugc_limited"
asset_type: "WaistAccessory"
creator: "Square Sponge"
creator_id: "345016319"
rap: 316
lowest_resale_price: 290
original_price: 0
total_quantity: 10000
copies_remaining: 0
sales_30d: 11
created_on: "2025-07-22"
currency: "ROBUX"
data_as_of: "September 15, 2026"
source: "RBX Invest"
---

# SpongeBob Baby Plankton Keychain

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SpongeBob Baby Plankton Keychain is a Roblox UGC Limited waist accessory by Square Sponge. Its original stock of 10,000 copies has sold out. Resale listings start at 290 R$, about 8% below its RAP of 316 R$. RBX Invest has tracked 11 sales of it in the past 30 days. It was created on Roblox on Jul 22, 2025. Square Sponge is a Roblox group rather than an individual user. RAP is Recent Average Price, the Roblox-published rolling average of recent sale prices. Figures as of September 15, 2026.

| Field | Value |
| --- | --- |
| RAP | 316 R$ |
| Lowest resale | 290 R$ |
| Original price | 0 R$ |
| Total quantity | 10,000 |
| Original copies remaining | Sold out |
| Sales (last 30 days) | 11 |
| Created on Roblox | Jul 22, 2025 |
| Favorites | 476 |
| Item type | UGC Limited |
| Category | Waist Accessory |
| Creator | Square Sponge |

## Item description

This is the description text Roblox carries for the item, quoted verbatim:

> He's just a baby!

## Collections this item belongs to

- [UGC Limited Waist Accessories — Belts & Tails Ranked by RAP](https://rbxinvest.com/collections/ugc-limited-waist-accessories) (HTML only)
- [Roblox Limiteds under 500 Robux — Live Budget Price List](https://rbxinvest.com/collections/limiteds-under-500) (HTML only)
- [Roblox Limiteds under 1,000 Robux — Mid-Tier Price List](https://rbxinvest.com/collections/limiteds-under-1000) (HTML only)
- [Roblox Limiteds under 10,000 Robux — The Investment Tier](https://rbxinvest.com/collections/limiteds-under-10000) (HTML only)

## More Limiteds by Square Sponge

- [SpongeBob MY LEG Keychain — RAP 230 R$](https://rbxinvest.com/item/121600453494349.md)

## Limiteds at a similar price

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- [C3's Vintage Racing Goggles V2 \[LIMITED\] — RAP 410 R$](https://rbxinvest.com/item/132783305261094.md)
- [- — RAP 410 R$](https://rbxinvest.com/item/15727525627.md)
- [SFOTH Sword Crown — RAP 410 R$](https://rbxinvest.com/item/14760151063.md)

## Related pages

- [Square Sponge — full catalog](https://rbxinvest.com/creator/345016319.md)
- [Roblox Limiteds leaderboard](https://rbxinvest.com/items.md)
- [Browse Limiteds by category, price, and rarity](https://rbxinvest.com/collections) (HTML only)

---

Source: [RBX Invest](https://rbxinvest.com/item/108486455041245) — independent Roblox Limited analytics, not affiliated with Roblox Corporation. RAP and reseller figures are read from Roblox and refreshed continuously; treat them as recent, not live.