The query "what if animation 18" appears to relate primarily to "What If...?", an animated series by Marvel Studios that explores alternate scenarios within the Marvel Cinematic Universe. This series is an adult animation rated TV-14, with episodes around 32 minutes each, featuring alternate versions of popular Marvel characters and storylines. Key points about "What If...?":

• It is a Marvel Studios animated anthology series starting August 2021 on Disney+.
• It reimagines pivotal moments from the MCU with different outcomes, creating alternate realities.
• The show features fan-favorite characters like Peggy Carter, T’Challa, Doctor Strange, Killmonger, and Thor.
• The series has 3 seasons running between 2021 and 2024.
• It has a TV-14 rating, suitable for viewers 14 and older.
• The animation style has received praise, though some seasons had mixed reviews regarding plot and pacing.
• The voice cast includes original MCU actors and Jeffrey Wright as The Watcher, the series' narrator and guide.
• Viewers must be at least 18 to subscribe to Disney+ in some regions to watch this and other content.

If the number "18" in the query refers to an age restriction or specific episode, the series itself is generally rated for teens 14 and older, and Disney+ requires being 18+ for subscription in some areas. The series embraces mature themes within the superhero genre through animated storytelling.

Let me know if more specific details are needed about episodes or the animation style.