A programmer has used computational analysis to investigate one of Super Mario 64’s longest-running mysteries, concluding that the blurry plaque in Peach’s Castle courtyard most likely reads “Eternal Star” and “We hope so.” The findings challenge the famous “L is Real 2401” interpretation that has fueled speculation about Luigi’s presence in the Nintendo 64 game for nearly 30 years.
The researcher, known as Mochi64, developed an open-source project called SM64 Plaque Decode to reconstruct how the inscription might have been created in 1996. Rather than attempting to sharpen the original image, the project tested millions of combinations of text, fonts, and rendering settings to determine which produced the closest mathematical match to the game’s texture.
The inscription appears on a plaque beneath a star statue in the courtyard behind Peach’s Castle. Its text occupies a texture measuring just 32×32 pixels, with individual letters only three to five pixels tall. That extremely low resolution has made it difficult to distinguish actual characters from visual artifacts, even in later versions of the game.
Mochi64 approached the problem by simulating the process a texture artist might have used during the Nintendo 64 era. The software renders candidate phrases using different typefaces, reduces them to the original resolution, applies effects such as blurring, and composites the resulting letters onto a stone background.
Each simulated texture is then compared against the original game’s pixels using a numerical mismatch score. Lower scores indicate a closer match between the reconstructed image and the original texture.
The analysis identifies Adobe’s 1990 Palatino Bold Italic as the strongest font candidate. Mochi64 reports that “Eternal Star” consistently outperformed competing interpretations of the plaque’s first line, while searches of thousands of English words supported “We hope so” as the second line.
In one comparison, the proposed “Eternal Star” interpretation received a mismatch score of approximately 789 for the first line, compared with 2,031 for “L is Real 2401.” The researcher also tested more than 1.2 million possible first words and found that “Eternal” ranked highest under the selected reconstruction model.
Further testing examined whether the approach could recover known words embedded in simulated plaques. According to the project’s published results, the system identified the correct dictionary word in all 50 blind tests, although the researcher acknowledges that some characters remain more uncertain than others.
The strongest evidence supports the words “Eternal,” “Star,” and “hope.” The final word, “so,” has a smaller advantage over alternative readings. Even the capitalization of “Star” remains unresolved.
The results offer a new explanation for an inscription closely associated with one of gaming’s most persistent rumors.
For decades, players have interpreted the plaque as saying “L is Real 2401,” believing the message might contain a clue about unlocking Luigi in Super Mario 64. The theory gained attention because Luigi was originally planned for the game before being removed during development.
Director Shigeru Miyamoto discussed the abandoned multiplayer concept in a 1996 interview, describing early experiments that allowed Mario and Luigi to explore environments together. The character’s removal helped sustain speculation that some secret method of accessing him might still exist.
The plaque itself, however, never provided a confirmed method of unlocking Luigi, and the proposed connection between its inscription and the character remained a fan interpretation.
Mochi64’s findings do not establish the plaque’s original wording beyond doubt. The method identifies text that best reproduces the existing pixels under a simulated production process, rather than recovering an original design document or statement from Nintendo’s developers.
The researcher has published the reconstruction code, supporting results, and a detailed technical report on GitHub. A separate challenge invites others to test alternative phrases against the same scoring system or identify weaknesses in the methodology.
For now, “Eternal Star / We hope so” represents a computationally supported interpretation of the famous inscription, rather than an officially confirmed solution. Nintendo has not confirmed that the proposed wording matches the original artists’ intentions.
