What this record means
The record shows that “NINJA WARRIORS” is an abandoned Principal Register application filed on Dec 22 1986 by CHILD’S PLAY INTERNATIONAL CORPORATION, with the abandonment dated Jul 25 1988 after the applicant failed to respond to an Office action. The only listed goods are toys—specifically action figures—under class 028, and the first use in commerce was Jan 17 1986. Because the filing covers only that narrow toy category, a similar name used for unrelated products would be a farther concern, but a name used for toys or related merchandise would raise the closest record‑based issue. The record does not give the owner control over every use of the words “NINJA” or “WARRIORS.” No oppositions, cancellations or court actions appear in the history, so there are no visible enforcement signals. I'd treat this as a meaningful concern if you plan a toy line with a comparable name.
Informational only - not legal advice.