The Secret of NIMH 2: Timmy to the Rescue 1999

Overview

Topic: Film "The Secret of NIMH 2: Timmy to the Rescue" (1999).
Constraints:
Use ONLY verifiable facts from provided SYNOPSIS and SOURCES.
No invented/guessed titles, names, dates, counts, awards, ratings, etc.
Original, neutral, encyclopedic prose.
Plain text only (no markdown, no asterisks, no headings, no bullet points).
Word count: 150-190 words.
First sentence must not contain spoilers.
Format: Plain text.
Title: The Secret of NIMH 2: Timmy to the Rescue.
Release Year: 1999 (per prompt/title) / 1998 (per Source 1 and 4). Correction: Source 1 says 12/22/1998 (US). Source 4 says 1998. I will use the 1998 date or mention the 1999 title context if needed, but I must stick to facts. The prompt says "The Secret of NIMH 2: Timmy to the Rescue" (1999), but Source 1 says 12/22/1998. I will use the 1998 date as it is explicitly in the source.
Genres: Animation, Family, Science Fiction, Fantasy, and Adventure.
Runtime: 1h 6m (66 minutes).
Production Country: USA.
Synopsis: Rats and mice, made intellectually superior in the original Secret of