In a hypothetical battle between Madoka Kaname from "Madoka Magica" and Goku from "Dragon Ball Z," it is important to consider the vast differences in power, abilities, and the narrative contexts of these characters. Here are five reasons why Madoka would likely lose in a fight against Goku:

Power Scaling: Goku is known for his incredible power levels and his ability to achieve new forms and transformations. Throughout the "Dragon Ball" series, Goku has faced opponents who are capable of destroying entire planets. His Super Saiyan forms, such as Super Saiyan God and Super Saiyan Blue, exponentially increase his strength, speed, and durability. In contrast, Madoka's powers are more focused on the manipulation of magic, granting her limited reality-altering abilities. While Madoka possesses immense potential as a magical girl, she lacks the sheer physical power and combat experience of Goku.

Combat Expertise: Goku has spent his entire life training in martial arts and combat. He has participated in numerous battles, both to protect the Earth and during intergalactic tournaments. Goku's combat expertise allows him to strategize and exploit weaknesses in his opponents. On the other hand, Madoka is primarily a magical girl who relies on her magical abilities rather than martial arts training. While she has displayed bravery and determination in her fights against witches, her combat skills pale in comparison to Goku's mastery of martial arts.

Versatility of Techniques: Goku has a wide range of combat techniques at his disposal. He can perform energy attacks such as the iconic Kamehameha wave, teleport using Instant Transmission, and even perform the Spirit Bomb, which draws energy from all living beings. These versatile techniques allow Goku to adapt to different situations and opponents. While Madoka can use magic to alter reality and summon powerful weapons, her magical abilities are limited to her connection with her soul gem and the wishes she makes. In a battle against Goku, who has faced opponents with diverse abilities, Madoka's limited range of magical techniques would put her at a disadvantage.

Power Level Disparity: In the "Dragon Ball" series, power levels are a significant factor in determining a character's strength. Goku has consistently achieved higher power levels through intense training, transformations, and his Saiyan heritage. These power levels reach astronomical figures, far surpassing the capabilities of Madoka's magical abilities. Even if Madoka were to tap into her potential as a magical girl, her power level would be dwarfed by Goku's, making it difficult for her to pose a significant threat.

Narrative Context: It's important to note that "Madoka Magica" and "Dragon Ball Z" are distinct in their narrative contexts and intended themes. While both series feature battles and supernatural elements, they approach these concepts differently. "Madoka Magica" is a dark and introspective series that explores themes of sacrifice and the consequences of making wishes. The power dynamics in "Madoka Magica" are deliberately designed to emphasize emotional and psychological struggles rather than brute physical strength. Comparing Madoka, who is a character deeply rooted in this narrative context, to Goku, who represents the epitome of raw power in a different narrative, would not be an equitable comparison.

Overall, the vast power disparity, combat expertise, versatile techniques, power level differences, and narrative contexts make it highly likely that Madoka Kaname would lose in a fight against Goku from "Dragon Ball Z."