Some data on Nabaztag v1 Hardware - Zirma/Raspberry-Nabztag GitHub Wiki

Original data:

• Motor: DC motor
• LEDS: 5 RGB leds -->

ICs on the board:

• U1 (PIC18LF6627): micro controller by Microchip
• U2 (L2870-A01U): sound driver by Oki
• U4 (AT45DB161B): 16 Mbit Flash Memory (SPI Interface)
• U5 (TLC5922): 16-Channel LED driver
• U8 (L293DNE): Dual H-Bridge DC-Motor driver

Regulator:

• REG1 (UTC LD117L 33 ): 3.3V regulator
• REG2 (1086PE): adjustable regulator (3.3V / 5V)

Some links about original Nabaztag:

• Audio converter for ADPCM files (Oki proprietary file format): http://spritesmods.com/?art=nabaztag
• list of tools & data: http://nabaztools.sourceforge.net/nabaztools-fr.html

Other hacks:

• https://www.hackster.io/bastiaan-slee/nabaztag-gets-a-new-life-with-google-aiy-e9f2c8
• http://www.instructables.com/id/Hack-the-Nabaztag/