Present at the beginning of the ROM.
There are two unused "Mega Duck" logo routines. One is at 5:$40DD, the unused routine of this game, the second is at 6:$7751, and this is a leftover from another game by the same developer. Both have wrong VDP registers mapping, so it will not work on the Game Boy at all. The same routines can be found in almost every Game Boy game developed or published by Sachen. Some of them are working, some not. This also is evidence, that all those games are developed for the Game Boy and Mega Duck consoles at the same time.
The second part of the ROM contains a lot of garbage leftovers from the "Black Forest Tale". While all game's graphics is packed, the bank $01 contains some unpacked graphics data blocks with portions of ending cutscenes graphics, as well it contains what appears to be an unused title screen logo "The King of Ants" with Commin copyrights instead of Sachen.
Rip and restore title.