CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the reference to our firm under the caption "Experts - AmSouth
Funds", in the Combined Proxy Statement of AmSouth Funds and Prospectus for
Pioneer Ibbotson Asset Allocation Series ("Combined Proxy Statements and
Prospectus"), and to the incorporation by reference of our report dated
September 29, 2004, with respect to the financial statements and financial
highlights of the AmSouth Aggressive Growth Portfolio, AmSouth Growth Portfolio,
AmSouth Growth & Income Portfolio, and AmSouth Moderate Growth & Income
Portfolio, included in the AmSouth Funds Annual Report for the year ended July
31, 2004, in the Combined Proxy Statements and Prospectus included in this
Registration Statement on Form N-14 of the Pioneer Ibbotson Asset Allocation
Series. We further consent to the reference to us under the heading
"Representations and Warranties" (paragraph 4.1(f)) in the Agreement and Plan of
Reorganization included as Exhibit A to the Combined Proxy Statements and
Prospectus.

We also consent to the references to our firm under the captions "Independent
Registered Public Accounting Firm" and "Financial Statements" in the AmSouth
Funds Statement of Additional Information, and to the incorporation by reference
of our report, dated September 29, 2004, on the financial statements and
financial highlights of AmSouth Aggressive Growth Portfolio, AmSouth Growth
Portfolio, AmSouth Growth & Income Portfolio, and AmSouth Moderate Growth &
Income Portfolio, included in the AmSouth Funds Annual Report for the year ended
July 31, 2004, in Post-Effective Amendment No. 43 to the Registration Statement
(Form N-1A, 1933 Nos. 33-21660) of the AmSouth Funds, as filed with the
Securities and Exchange Commission on December 1, 2004 (Accession No.
0000898432-04-000999), which is incorporated by reference into the Combined
Proxy Statements and Prospectus included in this Registration Statement on Form
N-14 of the Pioneer Ibbotson Asset Allocation Series.

                                /s/ ERNST & YOUNG LLP

Columbus, Ohio
June 29, 2005