"Grim Adventure Time with Marceline and Irwin, often shortened to Grim Adventure Time and simply called Marceline and Irwin (\u30DE\u30FC\u30BB\u30EA\u30F3\u3068\u30A2\u30FC\u30A6\u30A3\u30F3, M\u0101serin to \u0100u~in) in Japan, is an anime series and crossover of the Cartoon Network programs Adventure Time and The Grim Adventures of Billy & Mandy (with some other cartoons represented in the series). It focuses on the titular Marceline and Irwin, and is rated TV-PG."@en . . "Grim Adventure Time with Marceline and Irwin"@en . "Grim Adventure Time with Marceline and Irwin, often shortened to Grim Adventure Time and simply called Marceline and Irwin (\u30DE\u30FC\u30BB\u30EA\u30F3\u3068\u30A2\u30FC\u30A6\u30A3\u30F3, M\u0101serin to \u0100u~in) in Japan, is an anime series and crossover of the Cartoon Network programs Adventure Time and The Grim Adventures of Billy & Mandy (with some other cartoons represented in the series). It focuses on the titular Marceline and Irwin, and is rated TV-PG."@en . . . . . . .