Is it possible to successfully encrypt/decrypt in DUKPT using different sized BDKs?
As this is symmetric key encryption the key used to encrypt the data must be used to decrypt the data so if a double-length TDES key encrypted the data, the same double-length TDES key can decrypt the data. A triple-length TDES key cannot decrypt data encrypted by a double-length TDES key and vice versa.

The P2PE requires that the minimum length for a TDES key be triple-length, i.e. 192-bits (168-bit excluding parity). However, if implemented as part of a DUKPT key management scheme, the TDES keys may be double-length. This is detailed in the footnotes of Appendix C.