The Making of Jerry Boy

As a special bonus in the Jerry Boy comic book, GameFreak, the developers of the game, were interviewed about Jerry Boy. They also provided some of their development sketches as the game was being planned. This is a translation of their comments on these sketches. Click on each picture to see a larger version.

Making of Jerry Boy

The cartridge of Jerry Boy was put on the market in September 1991. In this action game consisting of 16 stages in total, the feeling of controlling a slime was considered unique. It is no longer for sale in the shops.

Story Setup

A cover and some of the story setting data. The game still has its old title, Jelly Bean. Although the story, demonstration, etc. were planned to be quite longer, they were cut down in the game. Much of what was cut can still be seen in the comic book.

Demo Scene Continuity Drawings

These are drawings for the demo scene included in the game at the end of World 3. In addition to sketches of the screen, the motion of the rocket is drawn in detail.

Demo Scene Idea Sketch

Ideas are sketched into some sort of storyboard, establishing a continuity between each stage. Screen images of each stage and demo scene are shown here.

Sketch of Jerry's Motion 1

This memo describing the motion of Jerry is used as the foundation of the game. Described here is the event that occurs when Jerry is touched by an enemy. The motion of his recoil is specified per dot.

Sketch of Jerry's Motion 2

This document directs the height of a jump, and the rules for adhering to a wall. They are the basis for the feel of controlling the character.

Character Animation Pattern Sketch 1

This document discribes how to animate an enemy character. The portion of sprite cells to use for each animation frame is determined here.

Character Animation Pattern Sketch 2

This is an animation sketch of a character called "Maruishi-Kun" (Mr. Round Stone). Although his rotation animation is displayed in 8 patterns, only 2 graphic patterns are being used, each being flipped horizontally or vertically.

Character Motion Pattern Sketch 1

This document directs the motion of Mr. Round Stone. Various situations are accounted for.

Character Motion Pattern Sketch 2

The speed by which other characters move is finely specified per dot.

Character Motion Pattern Sketch 3

This is a character that looks like a shot-put athlete. The animation pattern while he rotates, as well as his rotation speed, are seen. The line drawn through the middle of the pictures is the rotational centre.

Character Motion Pattern Sketch 4

This is a caveman character proposed by Mr. Tajiri. He appears as part of the background, trapped in a cage. The caveman's actions upon Jerry's approach are described, as well as Jerry's actions getting around the cage. In addition, the next page illustrates how the cage is installed into the wall.

This is then given to the programmer who will develop the game logic, and to Mr. Sugimori, who will illustrate the character.