From LLM-Driven Trading Card Generation to Procedural Relatedness: A Pok\'emon Case Study

TL;DR

This paper explores using Large Language Models and Image Diffusion Models to generate personalized, procedurally related Pokémon trading cards, aiming to enhance creativity and diversity in TCGs.

Contribution

It introduces a novel pipeline combining AI techniques for personalized card creation, enabling dynamic content and procedural relatedness in TCGs.

Findings

Participants rated visuals and mechanics highly.

Most participants successfully created their own card ideas.

The system fosters creative diversity and personalized experiences.

Abstract

Since the dawn of Trading Card Games, the genre has grown into a multi-billion-dollar industry engaging millions of analog and digital players worldwide. Popular TCGs rely on regular updates, balance adjustments, and rotating constraints to sustain engagement. Yet, as metagames stabilize, predictable strategies dominate and viable card options diminish, often resulting in repetitive and impaired player experiences. This paper investigates the use of Large Language Models and Image Diffusion Models for Procedural Content Generation of TCG cards, addressing these challenges by enabling a personalized infinity of card designs. Modern generative AI not only enables large-scale content creation but could even introduce procedural relatedness, fostering unique connections between players and their cards. We present a pipeline combining player-centric co-creation, fine-tuned embeddings, local LLMs, and Diffusion Models to generate dynamic, personalized cards while potentially expanding creative range. We evaluated the pipeline in a user study with 49 participants who generated 196 Pok\'emon card samples. Participants rated aesthetics and representativeness of visuals and mechanics, and provided qualitative feedback. Results show high satisfaction and indicate that most participants successfully realized their own ideas through prompt adjustments. These findings lay groundwork for future content generation systems and alternatives to conventional metagame evolution through procedural relatedness.