Doug Sulipa
First appearance of MONDO GECKO-c/s & the Merciless Slaughter his Heavy Metal Rock Band; MONDO GECKO = Later a member of the MIGHTY MUTANIMALS;
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Teenage Mutant Ninja Turtles Adventures #18 Newsstand $1.25 Canadian Price Variant
CGC Label Note
1
Advisor Noteissue insights from guide contributors
1st appearance of Mondo Gecko.
V9 NM- Guide$24
Reg CGC Pop.56
CPV CGC Pop.0
CPV Census Rarity0.0%
Collector Signals & Marketplace Snapshot
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Guide Values
V9: 2026-2027| Grade | Condition | CPV Value |
|---|---|---|
| 9.2 | Near Mint- | $24 |
| 9.0 | Very Fine / Near Mint | $21 |
| 8.0 | Very Fine | $17 |
| 6.0 | Fine | $12 |
| 4.0 | Very Good | $8 |
| 2.0 | Good | $4 |
Values are guide estimates and should be used alongside recent sales, condition, completeness, and market context.
Issue Notes
Key factsKey note: 1st appearance of Mondo Gecko.
Creator note: Dean Clarrain story; Ken Mitchroney cover & art
Characters: Merciless Slaughter, Mighty Mutanimals, Mondo Gecko, Teenage Mutant Ninja Turtles
Advisor Note
More Facts & Market Context
Value History
9.2 guide valuesRegularCPV
CGC Census History
Population trendRegular censusCPV census
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