Mezase Pachi Pro: Pachio-kun

Mezase Pachi Pro: Pachio-kun
Developer: Marionette Publisher: Coconuts Japan Platform: NES Released in JP: December 18, 1987 This game has a hidden developer message. This game has hidden developer credits.

One of the early attempts at converting a pachinko simulator to a home console. And hey, you get to play as an... anthropomorphic pachinko ball. Interesting.

The game spawned many sequels.

Secret Message

Start a game of pachinko, and press Select to open the pause menu. Select the third option and press Select 12 times. Then, select the second option and press Start 7 times. Finally, select the first option and press A. If done correctly, a secret message will appear which translates as "to Kaoru Suzuki-chan".

Unused Text

At offset 1FE84, there are two messages. The first is a string crediting the developers:

/ Computer designed by Marionette co. /
Programmed by Marionette co. /
Staff: O.Takayuki, S.Yoshiaki, O.Masataka, I.Masanobu, I.Taka /

O.Takayuki is Takayuki Onodera, S.Yoshiaki is Yoshiaki Sakaguchi, and I.Taka is Taka Iwamoto. The other names are unknown.

The second is one of the developers complaining:

Original
ii debugger ga hoshiiyo/ dareka YHP no debugger kattekure/ ongaku ga dasaiyo/graphic ga dasaiyo/ onaka suitayo/nenuiyo/ hayaku kaeritaiyo The programmer presumably meant "nemuiyo", but it's misromanized as "nenuiyo" here. (There's no meaning for "nenui".)
Original (converted to proper Japanese)
いいデバッガーがほしいよ。 誰かYHPのデバッガー買ってくれ。 音楽がダサいよ。　グラフィックがダサいよ。 お腹すいたよ。　眠いよ。 早く帰りたいよ。
English
I want a good debugger! Somebody, buy me YHP's debugger. The music sucks. The graphics suck. I'm starving. I'm tired. I got to go home fast.

(Source: CaH4e3)